Posted by **Maria** on Monday, May 7, 2007 at 10:49am.

please help me...for the power series summation of n^4x^n/2(n-1)factorial....find the radius

i am guessing the radius is either x or x/2 but i am still not sure..CAN someone help me plz?

PLZ HELP ME...i dont know where to start

Take the ratio of two succesive terms and take the limit n --> infinity. For finite x the limit is zero, which means that the radius of convergence is infinity. In general, the radius of convergence is that value for x you have to substitute in the above limit to make it equal to 1. In this case the limit is zero for all x.

so the radius would be x right?

## Answer this Question

## Related Questions

- CALC - please help me...for the power series summation of n^4x^n/2(n-1)factorial...
- Calculus - What is the radius of convergence of the power series (((2n)!x^(n...
- Calculus 2 - In the following series x is a real number. In each case, use the ...
- Calculus - a) Find the Taylor series associated to f(x) = x^-2 at a = 1. Be sure...
- Calculus 2 - Find the radius of convergence and interval of convergence of the ...
- please help! someone plz - Imagine a flat-bottomed cylinderal container with a ...
- calc - f(x)=x^2/4+x^3 find the power series representation...so far i found ...Ó...
- Calculus II - (a) Use differentiation to find power series representation for f(...
- local and state gov. - someone plz i really need help plz i cant find it in my ...
- CALC 2 - In the following series x is a real number. In each case, use the ratio...

More Related Questions