## 1201 Reputation

17 years, 235 days

## classic ?...

I suppose, you use the classic interface. Start Maple in Standard Mode, and it should work.

## AllSolutions...

solve(sin(2*x-3)=0,x,AllSolutions);

This works with Maple 13, for older versions you may set _EnvAllsolutions to true.

yo

## avoid e^...

r:=Vector([x0*exp(-t/t0)*cos(t/t0),y0*exp(-t/t0)*sin(t/t0),z0*exp(-t/t0)]);
map(diff,r,t);

r1:=unapply(%,t):

r1(u);

## you also could do this: X :=...

you also could do this:

X := RandomVariable(Normal(0, 1));
A := Sample(100+X, 1000)

## look...

B:=map(x->x+100,A)

use add to add up a finite number of objects, use sum to deal with closed form terms of series.

## If you show your code, we...

If you show your code, we will check it.

## This is interesting. So, for...

This is interesting. So, for this special class of functions (Möbius transformations, which built a group under composition ? ) i just have to put the coefficients into a 2x2 Matrix and call MatrixPower.

Repeated compositions are not easy to handle, i see. Only in special cases...

## ok...

Good to know that the usual suspects *always* seem to have an advice/solution. Of course, this is a simple example, just to show off the problem. So what i keep in mind is to try to describe repeated compositions as recurrencies.

Thanks for help

nt

## Thanks, btw. ...

Thanks,

btw.  Wolframalpha.com gives the solution Pi/2*sec(Pi*a/2) immediately.

jakubi ofc

## Thanks Jacubi. According to...

Thanks Jacubi. According to some source, the solution is also equal to

Pi/(2*cos(a*Pi/2))

How can i convert the LerchPhi solution to this elementary expression ? I know there is a command

convert(expr,elementary);

But as promising as it sounds, it doesn't work here :-)

## Substitutions in expressions...

Substitutions in expressions suck in Maple. Better check if your task can be done in a different way.

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