We can use z-transforms to find the sum of integers raised to various powers. This is accomplished by first recognizing that the sum is the solution of the difference equation
![2449_1029df59-36a2-4893-81af-55406b1e0a0f.png](https://secure.tutorsglobe.com/CMSImages/2449_1029df59-36a2-4893-81af-55406b1e0a0f.png)
where a(k) is the kth term in the summation. Evaluate the following summations using z-transforms.
![2369_ad5a7b4d-c29c-4acf-924d-e730e4b27c51.png](https://secure.tutorsglobe.com/CMSImages/2369_ad5a7b4d-c29c-4acf-924d-e730e4b27c51.png)