# Items tagged with summationsummation Tagged Items Feed

### Find integers A and B please!...

November 18 2013
1 3

Would really appreciate the help in doing this question!

Pi= infinity Σ n=0 ((120n^2+An+B)/(16^n(512n^4+1024n^3+712n^2+194n+15))) for some positive integers A,B.

Hint: Set A=0 to find B, then find A.

I'm so clueless as to how to do this. THANK YOU!

### print a summation of binomial coefficients...

September 09 2013
0 1

Hi, I want to print     t[n] / (-1)^n * sum   as following, but I don't know where the error is. Please help me.

Thank you very much.

### How to convert this into an expression of Summatio...

August 30 2013
0 1

convert 1/(1+z) to

Summation(....

### Simga (Could you do more clearly ?)...

August 26 2013
0 1

Let $n$ be any positive Integer :$\displaystyle \sum_{k=0}^{n-1}(\sqrt{ak^3+bk^2+ck+1}-\sqrt{ak^3+bk^2+ck})^{\frac{1}{3} }=\sqrt{n}$. Find

### How to include constant variables in summation and...

August 11 2013
1 2

Dear all,

I'm trying to substitute a combination of variables in an equation that is partly covered in a summation.

For example consider the equation with two variables A and B, and two function W(t) and q(z):

now I want to do the substitution:

### gradient in terms of sum set of indexed variables ...

June 26 2013
0 0

How does one take the gradient of a expression involving sums in terms of a set of indexed variables.

I am trying to find the maxima for the satisfaction for a public good from a tax code. The sum represents the total revenue. The tax code is defined as a piecewise linear function of income and indexed variables. The indexed variables represent the points of the kinks and the marginal tax rate for each income bracket. (The set of indexed variables will vary...

### help in write a summation on Maple...

May 13 2013
1 2

Hi

I want to write the following summation but Maple give the following error

summation:

### Physics: can i differentiate expression with prese...

March 21 2013
1 3

Hi there,

I have

x[i]=sum(sin(theta[j](t)), j = 1 .. i-1)

assuming i is integer and  i>=1 can Maple help me to differentiate with respect to time t ( for example diff(x[i],t) ) so

### How to summation and simplify q calculus wtih QDif...

February 17 2013
0 0

i am doing a Q Laplace and finally summation it

however, i find an AccurateQSummation which is not like Summation

Should i use it, if not, use SumTools' summation how to simplify it?

restart;with(QDifferenceEquations):qexp := QPochhammer(-(-p*t), q, infinity);f:= qexp*t;b := subs(t=q^n,f);QSimplify((1-q)*AccurateQSummation(b*q^n,n=-infinity..infinity));with(SumTools):QSimplify((1-q)*Summation(b*q^n,n=-infinity..infinity));

### How to laplace transform for hypergeometric form i...

December 21 2012
0 1

How to laplace transform for hypergeometric form in maple

### What do rsolve solve for...

December 21 2012
0 0

if rsolve is solving difference equation for L(x) in summation(L*z^n, n=0..infinity)

can i use double encapsulation to solve for summation(L*z^n/n!, n=0..finity)

step 1 use rsolved result of a given classic difference equation times z^n/n! * t^n

step 2 then summation step 1 and use celine method to change into difference equation again

step 3 solve this new difference equation

then i imagine L should be L*z^n/n!

but i am not sure...

### Why summation is not correct for Charlier...

December 16 2012
0 0

restart;
with(SumTools):
an := -n+L;
bn := -x+L;
gen := Summation(Product(an, L=0..k-1)*Product(bn, L=0..k-1)/k!*(-1/a)^k, k=0..infinity);
genfun1 := subs(a=z,simplify(gen));
genfun2 := exp(z)*(1-(z/mu))^x;

correct is genfun2

but using famous hypergeom of charlier written in many books and papers, it can not summation to a correct generating function

### How to summation this?...

December 08 2012
0 0

use the formula provided in

http://en.wikipedia.org/wiki/Hermite_polynomials

and run in Maple

Restart;
with(SumTools):
Hn := n!*Summation(((-1)^(n/2-l))/((2*l)!*(n/2-l)!)*((2*x)^(2*l)),l=0..n/2);
genfun := Summation(Hn/n!*z^n,n=0..infinity);

but result is not exp(2*x*t - t^2)

### Double Summations...

October 26 2012
0 6

I have a function that is a double summation and I cannot get maple to compute it. (I'm new to maple)

The function is as follows:

F(x) := sum from a=1 to x of [sum from b=0 to a-1 of [cos(2 pi x b / a)]]

for integer x, F should produce integers, but I am only getting 0's

naturally F is undefined for non integers. but maple is producing non 0 numbers for non integer entries. So, i have no idea what it is calculating.

Thanks in advance for any help. BC

### Factoring summations with equivalent index...

September 27 2012
1 5

 Given the following expression:
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