Hi, I have a pretty long symbolic expression and want to make Maple not output the function arguments in derivatives. I also want to make it print the derivatives of function of one variable as primes not D's.

For example lets take a function of one variable f()  with argument which is combination of two variables (x+y) and evaluate the partial derivative

diff(f(x+y), x);

I don't want Maple to print the argument of f() after the derivative and I want it to print the derivative of f with respect to its argument as prime not as D.

How do I solve this system?

2x + z(2x-6) = 0

2y + 2yz       = 0

x-6x + y = -23

these mixed variables and terms confuse me.

OK I thought this would be very easy, but after much puzzling I still can not figure this out.

Let's say that I start with some explicit floating-point numbers:

a_num := 1.330 :
b_num := 2.440 :
c_num := 3.660 :

The I construct a function using these values:

func := ( a_num + b_num * x ) * exp( - c_num * x ) :

Now what I need to do is simply the opposite of this: given the function func, and given an explicit known form of the function, assign the values a, b, c. Hypothetically it would look something like this:

Hi!

I'ld like to know how is implemented the proc "lagrange" in Maple (I mean which is the followed algorithm when you call it), and in general how to get access, if possible, to the way any proc (already implemented in Maple) is implemented.

Waiting for your help,

thank you.

Hi again.

Hi

Suppose I do the following definite integral:

Int(cos(m*x)*sin(n*x),x=0..Pi) assuming m::integer,n::integer

I recieve

-(2*m+2*(-1)^(1+m+n)*m)/(2*(-m^2+n^2))

Since I don't want to be mistaken wiht the first minus sign I do

collect(I1, m, normal)

Is there a way to tell Maple that m+n is odd or even since the answer depand on this information.  Of course, in this case, we can see immediatly but just for the peace of mind.

Mario

I am attempting to intergate with maple, also using Vecotr Cal. notations and have come upon some errors.  Maple tells me it is unable to match deliminators.  What does that mean?  I am new to using Maple and lost in it.

Thanks,

Stacey

I used rand() to get a list of random numbers between 0 and 1. It gives me something like

[.30000000, .50000000, .20000000]

But I want this to be like [.3,.5,.2]. As my code tells that both the above lists are unequal !!! How ? kindly explain me.

regards,

Athar

Hello everyone,

Can anyone describe me how to invert a function in Maple 9.5? The following, in particular:

piecewise(x<=20, 100-x-(3/80)*x^2+(3/1600)*x^3-2*x, x>=20 and x<=fsolve(1495/16-(201/64)*x+(33/1280)*x^2-(3/25600)*x^3=0), 1495/16-(201/64)*x+(33/1280)*x^2-(3/25600)*x^3)

Thank you in advance.

Ozgur

I have the following diff equation with IC that I am trying to solve but I always get the "invalid specification of initial conditions" message. Here is the definition of the function and IC:

alpha:=0.024:g:=9.81

var:={x(t),z(t),dx(t),dz(t)}:

eqn:=diff(x(t),t)=dx(t),diff(dx(t),t)=-0.51*alpha*dx(t)*v(t),diff(z(t),t)=dz(t),diff(dz(t),t)=-g-0.51*alpha*dz(t)*v0(t):

initcond:=x(0)=0,z(0)=h,dx(0)=v0*cost(theta),dz(0)=v0*sin(theta):

h:=1,v0:=25,theta:=15,w:=20:eta:=1:

sol:=dsolve({eqn,initcond},var,numeric);

Simple question: Can Maple plot x = 3

Allan

Hello Experts,

I'm relatively new to maple, and I wonder why I don't grok even this simple problem.