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Hello, sorry for may asking the most simple question ever, but we cant find a solution.

If we do have a simple eqation like this:

U=I*R

how to solve vor R=? using maple?

Okay, we do feel really stupid for asking that and okay we can do that by hand but how to use maple for this, especially when it becomes more complex? Are there any examples of this kind?

Tahnks a lot Eve and Andrew

Hi Maple friends.

How can I find the domain of y=sqrt(3*x-5)? or of y=1/(x+2)^2?

Thanks in advance.

Good day everyone, please help in writing finite difference algorithm for these coupled nonlinear ODE. See it here Algorithm.mw 

As title.

 

While  I can  decide velocity,charge and Distance.

 

 

 

Hi

I have three system of ODE and i would like to solve it using Homotopy perturbation method. Could you please provide to me the code in Maple or the Maple pachage that used to solve it by Homotopy perturbation method ?

I hope to hear you soon

Sara

 

Hello guys

I have a question:

I have an equation like below. Always it has different order for example :

T1:=q3*(r^6)+q2*(r^4)+q1*(r^2)+q0:
solve(T1=0,r):
and sometimes:

T2:=q5*(r^4)+q6*(r^2)+q7:
solve(T2=0,r):
q0,q1,q2,q3,q4,q5,q6 and q7 are constants.

We know that for T1 It has two real answer and for T2 we have any real answer.

How can I specify generally the real answers for all of them?

I want to use these real answer for another equation.

Thanks

My old disc with the maple version 17 worked perfect, but later the disc has colapsed. So I changed the disc and installed the programm. The installation and the activation were successfull. But the programm doesn't start more. Only the command-version in dow-window. What is wrong?

Hey, everyone!

Given the following equation: 

f:=x->x*exp(-x^2); 

 I need to plot the graph when x= 0.4.. How can I do that?

I managed to plot f(x) just fine, just not sure how to plot Newton'sMethod at x= 0.4.

Thanks in advance! :)

 

 

g := (1/8)*x*sin(13/x)+arcsin(5*x^2/(8*x^2+1))

G := unapply(g, x)

H(x) :=G(G(x))

 

I need to find the value of H'(pi/2). I tried this, but it didn't work;

simplify(eval(diff(H(x), x), x = (1/2)*Pi))

 

Will it not work for this type of question? 

Thanks :)

f(x) :=(x^(12)-x*sin(x^(11)))/(x^(34))+e^(sqrt(x+4))*ln(abs((cos(x)^(5))-6))

diff(f(x), x$2)

 

What would I need to type in if I would want to find f^-2(5)? I've tried this;

diff(f(5), x$2)

But it keeps giving me zero... Thanks in advance! :)

 

This is going to sounds so stupid probably, but I'm a newbie with the software and I really am clueless at the moment.

I was asked to define given information as a function, then sub -25 in for x to verify I typed the function correctly. But it's not working.. (I have a screenshot saved to my computer, but apperently I can't post it).

 

f(x) :=(x^(12)-x*sin(x^(11)))/(x^(34))+e^(sqrt(x+4))*ln(abs((cos^(5)x)-6))

 

This is my function...how do I check what value f(-25) will give me? When I calculate it (first with evalf, then without) it only showed another function as the answer, rather than the answer..sigh, I'm terrible with this software.

SmithChart.mw
 If I want to plot Smith Chart ,how do I mark a circle of arbitrary values?

then,How do I avoid the polar line to cover other  circle line?

Any body can give me some ideas or better ways to plot Smith Chart?

Thanks.

(Z0)   + I Ω    

(ZL) + I Ω

(ω) rad/s

α dB/m= Np/m

(β) rad/m

Zg

(l)

(z)  l

(Vg)

(u)

output:                                                                 

                

(Γ)                                 

(Γ)

            

 (SWR)  

 

(zL):

           

 (YL): S

  tanhγℓ

  tanβℓ

 (Zin):   Ω

  (zin):

    (γ):

(Vo)(z=0): V

      (Io)(z=0): A

Vo+):      V         

(Vo-):  V 

               (Vs): V

  (Is): A

             ):

  r=     ,   x=   Yo=

``
with(plots):

 

``

 

``

````

``

``

help("?")

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Download SmithChart.mwSmithChart.mw

 

 V = {(2a + b + c, 3a + b + 2c, 2a + c, b + 7c)|a, b, c ∈ R} forms a subspace of R^4 
 
 Show that {(2, 3, 2, 0),(1, 1, 0, 1),(0, 1, 1, 6)} is an (ordered) basis B for V . 

toally confused on how to do this??..please help!!

Like for instance if I have a formula: ((x^2+y^3)*a1+(x+y^3)*a2)/x^2 and other similar forms as entries for a matrix M, I want to change each entries to a form like this: ((x^2+y^3)/x^2)*a1 + ((x+y^3)/x^2)*a2, what would be the right way to do this?

Thanks for any answers in advance!


restart:

k:=75.11: m:=2: L:=3: with(plots):

Warning, the name changecoords has been redefined

a:=(m*L)+k-1:

b:=k-(m*L):

p:=((((k*m)/snr)^((a+1)/2))*MeijerG([[-a/2,(1-a)/2],[]],[[b/2,-b/2],[-(1+a)/2]],((k*m)/snr)))/(2*sqrt(Pi)*GAMMA(m*L)*GAMMA(k)):

result:=[seq([i,evalf(eval(p,snr=i))],i=1..30)];

result := [[1, -0.6330041673e120], [2, -0.4613210864e64], [3, 0.3668245238e39], [4, 0.1139121839e25], [5, 0.3579973839e14], [6, -206229.5169], [7, -0.3974877718e-1], [8, 0.9674643749e-5], [9, 0.5391296818e-5], [10, 0.3196265870e-5], [11, 0.1976463916e-5], [12, 0.1266745865e-5], [13, 0.8372952650e-6], [14, 0.5684795395e-6], [15, 0.3951633407e-6], [16, 0.2804713655e-6], [17, 0.2027996228e-6], [18, 0.1491013191e-6], [19, 0.1112814841e-6], [20, 0.8419420597e-7], [21, 0.6449585541e-7], [22, 0.4997027323e-7], [23, 0.3912177900e-7], [24, 0.3092406713e-7], [25, 0.2466212008e-7], [26, 0.1983074835e-7], [27, 0.1606835720e-7], [28, 0.1311299491e-7], [29, 0.1077276000e-7], [30, 0.8905591111e-8]]

plots:-pointplot(result);

Error, `plots` does not evaluate to a module

 

 


Download ak_BER_9sep.mw

need to plot these values for various values of i.

any help??

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