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en-us2014 Maplesoft, A Division of Waterloo Maple Inc.Maplesoft Document SystemThu, 30 Oct 2014 15:55:23 GMTThu, 30 Oct 2014 15:55:23 GMTThe questions most recently asked on MaplePrimeshttp://www.mapleprimes.com/images/mapleprimeswhite.jpgMaplePrimes - Newest Questions
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Solving for values
http://www.mapleprimes.com/questions/202725-Solving-For-Values?ref=Feed:MaplePrimes:New Questions
<p>I'm trying to solve a series of equations and then graph them. I'm trying to solve for the variables involved:</p>
<p>values := solve({eq1, eq2, eq3, eq4, eq5, eq6, eq7, eq8, eq9,</p>
<p>eq10, eq11, eq12, eq13, eq14, eq15, eq16}, {a, b, b, c, d, e, f,</p>
<p>g, h, i, j, k, l, m, n, o, p});</p>
<p> </p>
<p>. . . but it gives me this:</p>
<p>Warning, solving for expressions other than names or functions <span>is not recommended. </span></p>
<p><span>values := </span></p><p>I'm trying to solve a series of equations and then graph them. I'm trying to solve for the variables involved:</p>
<p>values := solve({eq1, eq2, eq3, eq4, eq5, eq6, eq7, eq8, eq9,</p>
<p>eq10, eq11, eq12, eq13, eq14, eq15, eq16}, {a, b, b, c, d, e, f,</p>
<p>g, h, i, j, k, l, m, n, o, p});</p>
<p> </p>
<p>. . . but it gives me this:</p>
<p>Warning, solving for expressions other than names or functions <span>is not recommended. </span></p>
<p><span>values := </span></p>202725Thu, 30 Oct 2014 13:30:32 ZedrobinaedrobinaHow to fix: 'Error, (in int) integration range' ??
http://www.mapleprimes.com/questions/202724-How-To-Fix-Error-in-Int-Integration?ref=Feed:MaplePrimes:New Questions
<p>int(int(y, 0 <= y, x^2+y^2+z^2 <= 1));<br><br>Error, (in int) integration range or variable must be specified in the second argument, got 0 <= y</p>
<p>int(int(y, y = 0, x^2+y^2+z^2 = 1));<br><br>Error, (in int) integration range or variable must be specified in the second argument, got y = 0</p>
<h3>Hi, </h3>
<h3>I keep getting this error when trying to solve the following integration problem:</h3>
<p>int(int(y, 0 <= y, x^2+y^2+z^2 <= 1));<br /><br />Error, (in int) integration range or variable must be specified in the second argument, got 0 <= y</p>
<h3>I've tried re-writting the range, but same error:</h3>
<p>int(int(y, y = 0, x^2+y^2+z^2 = 1));<br /><br />Error, (in int) integration range or variable must be specified in the second argument, got y = 0</p>
<h3>Please help! :)</h3>202724Thu, 30 Oct 2014 12:09:05 ZSekamaneSekamaneA major-league pitcher
http://www.mapleprimes.com/questions/202723-A-Majorleague-Pitcher-?ref=Feed:MaplePrimes:New Questions
<p>A major-league pitcher releases a ball at a point 6 feet above the ground and 58 feet from home plate at a speed of 100 mi/hr , </p>
<p>If gravity had no effect, the ball would travel along a line and cross home plate 4 feet off the ground. Find the drop D caused by gravity. </p>
<p> </p>
<p>NB: in this problem the angle alpha is the angle between the horizontal and the direction of the released ball. Since the ball is dropping, alpha will be negative.</p><p>A major-league pitcher releases a ball at a point 6 feet above the ground and 58 feet from home plate at a speed of 100 mi/hr , </p>
<p>If gravity had no effect, the ball would travel along a line and cross home plate 4 feet off the ground. Find the drop D caused by gravity. </p>
<p> </p>
<p>NB: in this problem the angle alpha is the angle between the horizontal and the direction of the released ball. Since the ball is dropping, alpha will be negative.</p>202723Thu, 30 Oct 2014 10:21:40 Zlaporte bernardlaporte bernardconvert second order ode to first order ode....
http://www.mapleprimes.com/questions/202722-Convert-Second-Order-Ode-To-First-Order-Ode?ref=Feed:MaplePrimes:New Questions
<p>Hi every body:</p>
<p>i have a second order ode and will convert to two ode of first order with maple,how do this work???</p>
<p>eq := diff(y(x), x, x)+2*y(x)+y(x)^2 = 0</p><p>Hi every body:</p>
<p>i have a second order ode and will convert to two ode of first order with maple,how do this work???</p>
<p>eq := diff(y(x), x, x)+2*y(x)+y(x)^2 = 0</p>202722Thu, 30 Oct 2014 08:46:50 Zmehran rajabimehran rajabiwrong taylor expansion result
http://www.mapleprimes.com/questions/202720-Wrong-Taylor-Expansion-Result?ref=Feed:MaplePrimes:New Questions
<p>taylor(1/(1+z^2), z = 1, 4)</p>
<p>The result is </p>
<p>1/2-(1/2)*<strong>z-1</strong>+(1/4)*(z-1)^2+O((z-1)^4)</p>
<p>but in fact the result is </p>
<p>1/2-(1/2)*<strong>(z-1)</strong>+(1/4)*(z-1)^2+O((z-1)^4)</p>
<p>my Maple is Maple 16,How to solve this problem?</p><p>taylor(1/(1+z^2), z = 1, 4)</p>
<p>The result is </p>
<p>1/2-(1/2)*<strong>z-1</strong>+(1/4)*(z-1)^2+O((z-1)^4)</p>
<p>but in fact the result is </p>
<p>1/2-(1/2)*<strong>(z-1)</strong>+(1/4)*(z-1)^2+O((z-1)^4)</p>
<p>my Maple is Maple 16,How to solve this problem?</p>202720Thu, 30 Oct 2014 07:45:56 Z_zgj_zgjArguments in legend of pointplot
http://www.mapleprimes.com/questions/202719-Arguments-In-Legend-Of-Pointplot?ref=Feed:MaplePrimes:New Questions
<p>Hi there,</p>
<p>is it possible to have the <strong>legend</strong> of a pointplot accepting <strong>arguments</strong>?</p>
<p>Say I have an array of 3 values (e.g. p:=[1.5,2,2.5]) representing a given parameter for a function. When representing this function by means of a plot, I would like the <strong>legend</strong> (legend="Parameter " + value in array; legend=["Parameter", "Parameter", "Parameter") <strong>to accept the contents of the array</strong>, <strong>without entering the values manually</strong>:</p>
<p>Parameter 1.5</p>
<p>Parameter 2</p>
<p>Parameter 2.5</p>
<p> </p>
<p>How can this be achieved?</p>
<p> </p>
<p>Thanks,</p>
<p>jon</p><p>Hi there,</p>
<p>is it possible to have the <strong>legend</strong> of a pointplot accepting <strong>arguments</strong>?</p>
<p>Say I have an array of 3 values (e.g. p:=[1.5,2,2.5]) representing a given parameter for a function. When representing this function by means of a plot, I would like the <strong>legend</strong> (legend="Parameter " + value in array; legend=["Parameter", "Parameter", "Parameter") <strong>to accept the contents of the array</strong>, <strong>without entering the values manually</strong>:</p>
<p>Parameter 1.5</p>
<p>Parameter 2</p>
<p>Parameter 2.5</p>
<p> </p>
<p>How can this be achieved?</p>
<p> </p>
<p>Thanks,</p>
<p>jon</p>202719Thu, 30 Oct 2014 07:16:42 ZjonlgjonlgI lost the frame of my graphics
http://www.mapleprimes.com/questions/202721-I-Lost-The-Frame-Of-My-Graphics?ref=Feed:MaplePrimes:New Questions
<p>When I plot an expresion I would the graphics be framed. What I am getting, instead, is the curve and the axis, whith no frame at all. How can I force Maple to make the graphic surrounded by a frame? </p><p>When I plot an expresion I would the graphics be framed. What I am getting, instead, is the curve and the axis, whith no frame at all. How can I force Maple to make the graphic surrounded by a frame? </p>202721Thu, 30 Oct 2014 06:55:14 ZEUREKA ! (shouted Archimedes)
http://www.mapleprimes.com/questions/202718-EUREKA--shouted-Archimedes?ref=Feed:MaplePrimes:New Questions
<p>Archimedes supposedlly, was asked to determine whether a crown made for the king consisted of pure gold. According to </p>
<p>legend, he solved this problem by weighing the crown first in air and then in water. Suppose the scale read 7.84 N when the </p>
<p>crown was in the air and 6.84 N when it was in water.</p>
<p> </p>
<p>What should Archimedes have told the king ?</p>
<p> </p><p>Archimedes supposedlly, was asked to determine whether a crown made for the king consisted of pure gold. According to </p>
<p>legend, he solved this problem by weighing the crown first in air and then in water. Suppose the scale read 7.84 N when the </p>
<p>crown was in the air and 6.84 N when it was in water.</p>
<p> </p>
<p>What should Archimedes have told the king ?</p>
<p> </p>202718Wed, 29 Oct 2014 16:11:28 Zlaporte bernardlaporte bernardMatlab to maple
http://www.mapleprimes.com/questions/202717-Matlab-To-Maple?ref=Feed:MaplePrimes:New Questions
<p>Hi! I have a matlab worksheet that i need to convert it to Maplesoft. Is it possible?</p>
<p>Regards</p>
<p>Hikmat</p><p>Hi! I have a matlab worksheet that i need to convert it to Maplesoft. Is it possible?</p>
<p>Regards</p>
<p>Hikmat</p>202717Wed, 29 Oct 2014 16:03:31 ZhikkihikkiHow to define the derivative of a function as a function?
http://www.mapleprimes.com/questions/202716-How-To-Define-The-Derivative-Of-A-Function?ref=Feed:MaplePrimes:New Questions
<p>Take a look at below. I was expecting maple to give me "g'(1)"! :)<br><br><img src="/view.aspx?sf=202716_question/Untitled.jpg" alt=""><br><br></p><p>Take a look at below. I was expecting maple to give me "g'(1)"! :)<br><br><img src="/view.aspx?sf=202716_question/Untitled.jpg" alt=""><br><br></p>202716Wed, 29 Oct 2014 13:18:01 ZH-RH-RError, (in dsolve/numeric/bvp/convertsys) unable to convert to an explicit first-order system
http://www.mapleprimes.com/questions/202715-Error-in-Dsolvenumericbvpconvertsys?ref=Feed:MaplePrimes:New Questions
<p>hi.i am a problem with following dsolve.please help me....thanks alot</p>
<p>dsys3 := {10*f2(x)+12*(diff(f1(x), x))+14*f3(x) = 0, 2*(diff(f1(x), x, x))+4*(diff(f2(x), x))+6*(diff(f3(x), x)) = 0, 16*(diff(f3(x), x, x, x, x))+19*(diff(f3(x), x, x))+22*(diff(f1(x), x))+25*f2(x)+27*f3(x)+29*f3(x)+31+32 = 0, f1(0) = 0, f1(1) = 0, f2(0) = 0, f2(1) = 0, f3(0) = 0, f3(1) = 0, ((D@@1)(f1))(0) = 0, ((D@@1)(f1))(1) = 0, ((D@@1)(f2))(0) = 0, ((D@@1)(f2))(1) = 0, ((D@@1)(f3))(0) = 0, ((D@@1)(f3))(1) = 0}; dsol5 := dsolve(dsys3, 'maxmesh' = 500, numeric, range = 0 .. 1, abserr = .1, output = listprocedure); fy3 := eval(f3(x), dsol5); fy2 := eval(f2(x), dsol5); fy1 := eval(f1(x), dsol5)<a href="/view.aspx?sf=202715_question/ERROR.mw">ERROR.mw</a></p><p>hi.i am a problem with following dsolve.please help me....thanks alot</p>
<p>dsys3 := {10*f2(x)+12*(diff(f1(x), x))+14*f3(x) = 0, 2*(diff(f1(x), x, x))+4*(diff(f2(x), x))+6*(diff(f3(x), x)) = 0, 16*(diff(f3(x), x, x, x, x))+19*(diff(f3(x), x, x))+22*(diff(f1(x), x))+25*f2(x)+27*f3(x)+29*f3(x)+31+32 = 0, f1(0) = 0, f1(1) = 0, f2(0) = 0, f2(1) = 0, f3(0) = 0, f3(1) = 0, ((D@@1)(f1))(0) = 0, ((D@@1)(f1))(1) = 0, ((D@@1)(f2))(0) = 0, ((D@@1)(f2))(1) = 0, ((D@@1)(f3))(0) = 0, ((D@@1)(f3))(1) = 0}; dsol5 := dsolve(dsys3, 'maxmesh' = 500, numeric, range = 0 .. 1, abserr = .1, output = listprocedure); fy3 := eval(f3(x), dsol5); fy2 := eval(f2(x), dsol5); fy1 := eval(f1(x), dsol5)<a href="/view.aspx?sf=202715_question/ERROR.mw">ERROR.mw</a></p>202715Wed, 29 Oct 2014 12:11:34 Z90091349009134Entropy changes in a free expansion
http://www.mapleprimes.com/questions/202714-Entropy-Changes-In-A-Free-Expansion?ref=Feed:MaplePrimes:New Questions
<p>ADIABATIC FREE EXPANSION</p>
<p> </p>
<p>Suppose an ideal gas expands to four times its initial volume. From experience for this process, the initial and final </p>
<p>temperature are the same.</p>
<ol>
<li>Using a macroscopic approach, calculate the entropy change for the gas</li>
<li>Using statistical considerations, calculate the change in entropy for the gas and show that it agrees with the answer <br>you obtained in part 1.</li>
</ol><p>ADIABATIC FREE EXPANSION</p>
<p> </p>
<p>Suppose an ideal gas expands to four times its initial volume. From experience for this process, the initial and final </p>
<p>temperature are the same.</p>
<ol>
<li>Using a macroscopic approach, calculate the entropy change for the gas</li>
<li>Using statistical considerations, calculate the change in entropy for the gas and show that it agrees with the answer <br>you obtained in part 1.</li>
</ol>202714Wed, 29 Oct 2014 07:52:09 Zlaporte bernardlaporte bernardconditional probability DICE
http://www.mapleprimes.com/questions/202710-Conditional-Probability-DICE?ref=Feed:MaplePrimes:New Questions
<blockquote>
<p><!--break--><!--break--><!--break--></p>
</blockquote>
<p><strong>What is the probability that the total of two dice will be greater than 9, given that the first die is a 5?</strong></p>
<p> </p><blockquote>
<p><!--break--><!--break--><!--break--></p>
</blockquote>
<p><strong>What is the probability that the total of two dice will be greater than 9, given that the first die is a 5?</strong></p>
<p> </p>202710Wed, 29 Oct 2014 07:23:31 Zlaporte bernardlaporte bernardSolving system of ODEs whose variables come in 2 parameters
http://www.mapleprimes.com/questions/202708-Solving-System-Of-ODEs-Whose-Variables?ref=Feed:MaplePrimes:New Questions
<p>Let N be an integer. </p>
<p> </p>
<p>For each pair of integers (n,m) where 1<= n,m <= N, we have a variable f_{n,m}(t). </p>
<p> </p>
<p>Then for these we have a system of ODEs </p>
<p> </p>
<p>d/dt f_{n,m}(t) = \sum_{n', m'} f_m'n' * f_m''n'' * (m'n'' - m''n') </p>
<p> </p>
<p>where m''=m-m', n''=n=n', and the sum is simply over for all pairs (n',m'). </p>
<p> </p>
<p>I simply do not know how to put these set of equations into Maple in a nice way. </p>
<p> </p>
<p>I will really appreciate any help!</p><p>Let N be an integer. </p>
<p> </p>
<p>For each pair of integers (n,m) where 1<= n,m <= N, we have a variable f_{n,m}(t). </p>
<p> </p>
<p>Then for these we have a system of ODEs </p>
<p> </p>
<p>d/dt f_{n,m}(t) = \sum_{n', m'} f_m'n' * f_m''n'' * (m'n'' - m''n') </p>
<p> </p>
<p>where m''=m-m', n''=n=n', and the sum is simply over for all pairs (n',m'). </p>
<p> </p>
<p>I simply do not know how to put these set of equations into Maple in a nice way. </p>
<p> </p>
<p>I will really appreciate any help!</p>202708Tue, 28 Oct 2014 22:37:26 ZIn-Jee JeongIn-Jee Jeongvector-valued functions and space curves
http://www.mapleprimes.com/questions/202707-Vectorvalued-Functions-And-Space-Curves?ref=Feed:MaplePrimes:New Questions
<ol>
<li>Sketch the two vectors listed after the formula for <strong>r</strong> (t).</li>
<li>Sketch, on the same plane, the curve C dterminated by r (t), and indicate the orientation for the given values of t.<br><br><strong>r</strong> (t)=t*<strong>i</strong> +4*cos (t)<strong>j</strong> +9*sin (t)<strong>k</strong>,<br><br><strong>r</strong> (0),<strong> r</strong>(Pi/4), t>=0<br><br></li>
</ol><ol>
<li>Sketch the two vectors listed after the formula for <strong>r</strong> (t).</li>
<li>Sketch, on the same plane, the curve C dterminated by r (t), and indicate the orientation for the given values of t.<br><br><strong>r</strong> (t)=t*<strong>i</strong> +4*cos (t)<strong>j</strong> +9*sin (t)<strong>k</strong>,<br><br><strong>r</strong> (0),<strong> r</strong>(Pi/4), t>=0<br><br></li>
</ol>202707Tue, 28 Oct 2014 18:55:54 Zlaporte bernardlaporte bernard