MaplePrimes - Questions and Posts tagged with equation
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http://www.mapleprimes.com/tags/equation
How to solve this equation with allsolutions
http://www.mapleprimes.com/questions/220490-How-To-Solve-This-Equation-With-Allsolutions?ref=Feed:MaplePrimes:Tagged With equation
<p>Hi all,</p>
<p>I have this equation that I can not get all solutions symbolically:</p>
<p>restart:</p>
<p>eq1 := cos(lambda*ln(r1))*cos(lambda*ln(r2))+sin(lambda*ln(r1))*sin(lambda*ln(r2))-1 = 0:</p>
<p>solve(eq1, lambda, allsolutions) assuming r1>0, r2>0, r2>r1</p>
<p>when r1:=1: r2:=2: I get the solution</p>
<p>2*Pi*Z/ln(2)</p>
<p>when r1:=1.1: and r2:=2.1: # no solutions</p>
<p>How to get symbolique solution</p>
<p>Thanks</p>
<p> </p>
<p> </p>
<p>Hi all,</p>
<p>I have this equation that I can not get all solutions symbolically:</p>
<p>restart:</p>
<p>eq1 := cos(lambda*ln(r1))*cos(lambda*ln(r2))+sin(lambda*ln(r1))*sin(lambda*ln(r2))-1 = 0:</p>
<p>solve(eq1, lambda, allsolutions) assuming r1>0, r2>0, r2>r1</p>
<p>when r1:=1: r2:=2: I get the solution</p>
<p>2*Pi*Z/ln(2)</p>
<p>when r1:=1.1: and r2:=2.1: # no solutions</p>
<p>How to get symbolique solution</p>
<p>Thanks</p>
<p> </p>
<p> </p>
220490Thu, 15 Dec 2016 20:53:17 ZAlgerAlgerCan Maple find a determinant corresponding to a symbolic equation?
http://www.mapleprimes.com/questions/220242-Can-Maple-Find-A-Determinant-Corresponding?ref=Feed:MaplePrimes:Tagged With equation
<p>For exaqmple, the quadratic equation w^2 + uw + v = 0 corresponds to the deter minant</p>
<p><br>
| -u 1 1 |</p>
<p>| v 0 1 | = 0</p>
<p>|w^2 w w-1|</p>
<p>Is there any way to find a determinant corresponding to an equation, as above?</p>
<p>This is an issue in the preparation of a nomograph for the initial equation. </p>
<p>It is generally solved by trial and error.</p>
<p>For exaqmple, the quadratic equation w^2 + uw + v = 0 corresponds to the deter minant</p>
<p><br>
| -u 1 1 |</p>
<p>| v 0 1 | = 0</p>
<p>|w^2 w w-1|</p>
<p>Is there any way to find a determinant corresponding to an equation, as above?</p>
<p>This is an issue in the preparation of a nomograph for the initial equation. </p>
<p>It is generally solved by trial and error.</p>
220242Wed, 30 Nov 2016 04:19:33 ZleslieglasserleslieglasserHow do I solve a differential equation in Maple?
http://www.mapleprimes.com/questions/220229-How-Do-I-Solve-A-Differential-Equation-In-Maple?ref=Feed:MaplePrimes:Tagged With equation
<p>How do I solve a differential equation in maple? Is there a specific identity that you can use?</p>
<p>How do I solve a differential equation in maple? Is there a specific identity that you can use?</p>
220229Mon, 28 Nov 2016 19:13:37 Zineedhelpwithmath2016ineedhelpwithmath2016solve ODE equation by dsolve
http://www.mapleprimes.com/questions/219105-Solve-ODE-Equation-By-Dsolve-?ref=Feed:MaplePrimes:Tagged With equation
<p>I have tried to solve the following ode equation, but I have got error. What is the potencial problem?</p>
<p>http://i65.tinypic.com/xdcl8p.jpg</p>
<p> </p>
<p> <img src="http://i65.tinypic.com/xdcl8p.jpg" alt="error" width="875" height="492"></p>
<p> </p><p>I have tried to solve the following ode equation, but I have got error. What is the potencial problem?</p>
<p>http://i65.tinypic.com/xdcl8p.jpg</p>
<p> </p>
<p> <img src="http://i65.tinypic.com/xdcl8p.jpg" alt="error" width="875" height="492"></p>
<p> </p>219105Thu, 13 Oct 2016 11:47:58 Zloramina123loramina123how to get the coordinate of a swirl
http://www.mapleprimes.com/questions/217377-How-To-Get-The-Coordinate-Of-A-Swirl-?ref=Feed:MaplePrimes:Tagged With equation
<p>http://mathforum.org/kb/message.jspa?messageID=685890</p>
<p>i find equation above</p>
<p>for ii from 0 by 5 to 365 do<br> eq1 := x^2 + y^2 = arccos(x/r);<br> eq2 := y = evalf((atan(-1) - ii*Pi/180)/Pi)*(-1.0)*x;<br> xy := fsolve({eq1, eq2});<br> print("M",rhs(xy[1]),rhs(xy[2]),","):<br>od:</p>
<p>but i do not understand how to set r</p>
<p>i use a line scanning 365 degrees to get the path of swirl </p>
<p>would like to get path data for c# WPF animation</p>
<p>but this method may have multiple solution because an intersection of swirl </p>
<p>and a line can have multiple points</p><p>http://mathforum.org/kb/message.jspa?messageID=685890</p>
<p>i find equation above</p>
<p>for ii from 0 by 5 to 365 do<br> eq1 := x^2 + y^2 = arccos(x/r);<br> eq2 := y = evalf((atan(-1) - ii*Pi/180)/Pi)*(-1.0)*x;<br> xy := fsolve({eq1, eq2});<br> print("M",rhs(xy[1]),rhs(xy[2]),","):<br>od:</p>
<p>but i do not understand how to set r</p>
<p>i use a line scanning 365 degrees to get the path of swirl </p>
<p>would like to get path data for c# WPF animation</p>
<p>but this method may have multiple solution because an intersection of swirl </p>
<p>and a line can have multiple points</p>217377Sat, 10 Sep 2016 09:24:58 Zasa12asa12surd produces absurd result
http://www.mapleprimes.com/questions/216348-Surd-Produces-Absurd-Result?ref=Feed:MaplePrimes:Tagged With equation
<p>I am trying to solve an equation using surd and I get a strange result.</p>
<p><img src="https://i.imgur.com/jX4592R.png" alt="" width="553" height="207"></p>
<p>solve(surd(x^4,8)=-2)<br> 4, -4, 4 I, -4 I</p>
<p>These solutions are clearly wrong.</p>
<p>The equation (x^4)^(1/8) = -2 has no solution.</p>
<p>This problem is equivalent to asking the computer to solve sqrt(x) = -2</p>
<p>which has no solution in R or C.</p>
<p> </p>
<p>However if I type</p>
<p>solve((x^4)^(1/8) = -2) , then I get no answer, which is what I expected.</p>
<p>Why does surd behave in this unexpected way.</p>
<p> </p>
<p>Also another thing I am wondering, why doesn't Maple simplify (x^4)^(1/8) to x^(1/2).</p>
<p>I tried the simplify command it didn't work.</p>
<p> </p><p>I am trying to solve an equation using surd and I get a strange result.</p>
<p><img src="https://i.imgur.com/jX4592R.png" alt="" width="553" height="207"></p>
<p>solve(surd(x^4,8)=-2)<br> 4, -4, 4 I, -4 I</p>
<p>These solutions are clearly wrong.</p>
<p>The equation (x^4)^(1/8) = -2 has no solution.</p>
<p>This problem is equivalent to asking the computer to solve sqrt(x) = -2</p>
<p>which has no solution in R or C.</p>
<p> </p>
<p>However if I type</p>
<p>solve((x^4)^(1/8) = -2) , then I get no answer, which is what I expected.</p>
<p>Why does surd behave in this unexpected way.</p>
<p> </p>
<p>Also another thing I am wondering, why doesn't Maple simplify (x^4)^(1/8) to x^(1/2).</p>
<p>I tried the simplify command it didn't work.</p>
<p> </p>216348Mon, 22 Aug 2016 22:04:22 Zmax125max125