is(sum( (1+i)^(k-1), k = 1 .. 8) = sum( (1+i)^(k-1), k = 8 .. 1))
                                                       false

Is that a bug in sum that got fixed in a newer Maple or maybe I missed something?...

Dear All,

I am trying to solve the following equation in Maple but could not find the actual result:

P:=1/2 * Real (E x H*)

How to find the real value of (E x H) with H*= H conjugate.   And also which command to solve for the value P.

Your help will really be appreciated

Thanks in advance

A.Q

Soton

Please write for me a proceduce in order to write the eqution of the common perpendicular to the two skewline 

d: x = 3*t - 7, y = -2*t +4, z = 3*t + 4 and

l: x = m + 1, y = 2m - 9, z = -m - 12.

I did:

with(geom3d);

line(d,[3*t-7,-2*t+4,3*t+4],t);

line(l,[m + 1,2*m - 9, - m - 12],m);

u:=ParallelVector(d);

v:=ParallelVector(l);

with(linalg);

w:=crossprod(u,v);

a:=crossprod(u,w);

Something simple enough, I want show (g^n) / (g^n -1) = 1 / 1 - g^(-n) step by step in maple. 

The problem I'm having is getting maple to freeze the terms.  Maple likes to simplify before I can have it do what I want.  I suppose I could make everything a name and show it manually but I would like to force maple to do it. 

first setting

h:=g^n/(g^n-1)

so first multiply the numerator and denominator by g^(-n)

HI,

I've got a MapleCode with exports the data in the end into an ".txt"-File. Now it's necessary to create an"Tab" instead of the semicolon, which is produced now between A and B.

Now: "A;B"

Should be: "A    B" (Tab between).

> fd := fopen("C:/ZZZ_TEST4.txt", WRITE);
                      ...

I wrote a program in order to find coordinates orthocenter of the triangle. Please comment for me. This is my code:

restart;

with(geom3d);

point(A,1,-3,0);

point(B,-2,1,1);

point(C,3,1,2);

line(AB,[A,B],t);

line(BC,[B,C],t);

ab:=ParallelVector(AB); 

bc:=ParallelVector(BC);

eq1:=Equation(plane(P,[C,ab],[x,y,z]));

eq2:=Equation(plane(Q,[A,bc],[x,y,z]));

eq3:=Equation(plane(ABC,[A,B,C],[x,y,z]));

i just installed maple 15 in my macbook but i can't find classic worksheet, is it only for window?

How can I replace/substitute a combination of variables with a new variable?

For example, if ...

h:=(1+i)^2+(1+i)^3*A+(1+i)^4*B

I want to assign the value g:=1+i

so that h returns g^2+g^3*A+g^4*B

Do I have to change the 1+i to a name? or can it be done as it is?

I am learning about programming; I have this equation:

2*K2*alpha*t=ln[(A0+E(beta-1/2)/(A0-E(beta+1/2)

The values of t, E are a list of values.

and K2 alpha and beta are unknown but i dont know how to do for graph the part of ln vs time and fit it to a line.

i want to solve a complex number useing sharp 9900 for example : cosh (7+j19) ......

so tell me how to write a program for solve this ???? or tell me how to solve it by sharp 9900 ????

For next list of variables 

RVars:=[[''Rla'',''Rlb'',''Rsa'',''Rsb'',''RN''], [''GAL'',''GBL'',''GAS'',''GBS'',''GN'']];

(no double qoutes, 2 single quotes, of course)

want all of them to be redefinable with suffix option i.e. both of operators below

assign(m || (RVars[1,1]), 5);

assign( RVars[1,1], 5);

should be reentered without restart as many as wish. With 2nd form everything...

I wrote a program to find the coordinates of thecenter circle circumscribed triangle

I find the least value of the function h(x) = 1+2*cos(2*x)+3*cos(4*x)+4*cos(8*x). I did

h:=x->1+2*cos(2*x)+3*cos(4*x)+4*cos(8*x);

minimize(h(x),x=-Pi/12..5*Pi/12,location=true);

But i received 1/2-3^(1/2), {[{x = 5/12*Pi}, 1/2-3^(1/2)]}. This is wrong answer. This is shown by

plot(h(x),x=-Pi/12..5*Pi/12); 

can you explain me when i solve equation beta-t*beta=0 with condition beta<>0. I write command:
r :=solve(beta-t*beta, t, UseAssumptions), assuming beta <> 0
It works well. But it will be a problem when command is:
r :=solve(beta-t*beta, t, UseAssumptions), assuming beta <> 0, gamma<>0;
Error: Error, (in assuming) when calling 'assume'. Received: 'cannot assume on a constant object'.
thank you very much.

Hello,

I need to verify some terms in an equation which would involve the application of chain rule. I have A:=f(x,y), x:=g(t,s) and y:=h(t,s). Now I want to find the terms that will be present in the expression after application of Chain rule for the term d^4(A)/dt^4. The exact definition of A is not know. It is just known that it is function of x & y. I just need the expression for d^4(A)/dt^4 in terms of dA/dt*dt/dx and so on. Could anyone please suggest a way of doing this in Maple?