25 Reputation

4 years, 314 days

compute determinant ...

Maple 17

hello,

so i'm trying to compute the determinant of a Matrix(7*7) to obtain a single equation ( dispersion equation ) that i need to use for further investigation.

But unfortunately for a certain value Bi=1(i need this value ) i get 0.it would be nice if some can help me

Determinant.mw

how to use fsolve?...

Maple 17

hello dear maple maple users.

I'm trying to solve this system of equations using fsolve but i'm geting this unrealistic curve.

I don't know exactly how, can help me understand!!!!!.

fsolve.mw

How do i find a relations between two ex...

Maple

hello dear fellows maple users,

I need help to find a relation between multiples expressions (A,B..etc) and one term (R). (otherwise, I want to write those expressions in terms of R).

```#A is given by

A:=nu^(2/3)*B/(g^(1/3)*(sin(beta))^(1/3)*h):

#and R is defined as:

R:=h^3*g*sin(beta)/(3*nu^2):```

I hope I expressed myself clearly.

thank you for any help you can offer.

how to use fsolve in maple?...

Maple

i wanna solve a system of equations using ''fsolve'', I have found this example:

fsolve({2*x-x*y=0,-y+3*x*y=0},{x,y}, {x=0.1..5,y=0..4});

but i wanna understand how does this work,and what is the signification of term

thank you for your help.

Solve equations...

Maple 17

I'm trying to solve this to set of equations :

```EQ1:=-1958143.922*k*wr+2468.8339*k^3*wr-0.9481118254e16*k^2-114000.8376*k^4:

EQ2 :=-1186578.220*R*k^2*wr-312683.0293*k^5-288960.9621*k^3*R:
```

using a loop for different value of R in the range this range (wr=0..10,k=0..10)

```eqns:={EQ1,EQ2}:
for i from 1 by 1 to 101 do R:=(i-1):S:=fsolve(eqns,{k, wr},{wr=0..10,k=0..10}):v(i):=(subs(S,(wr)));w(i):=(subs(S,(k)))end do:
```

but i get this instead :

```Error, invalid input: subs received fsolve({-312683.0293*k^5, -1958143.922*k*wr+2468.8339*k^3*wr-0.9481118254e16*k^2-114000.8376*k^4}, {k, wr}, {k = 0 .. 10, wr = 0 .. 10}), which is not valid for its 1st argument
```

is there another way to solves this equations more easly .

 1 2 Page 1 of 2
﻿