I have to find function represented by $\displaystyle \sum k^3z^k$
from k=1 to infinity.
I tried Taylor's expansion but it did not help me.
I am trying to solve this for couple of hours. Please give me a hint, or some suggestion.
thank you.
I have to find function represented by $\displaystyle \sum k^3z^k$
from k=1 to infinity.
I tried Taylor's expansion but it did not help me.
I am trying to solve this for couple of hours. Please give me a hint, or some suggestion.
thank you.