1. (2 x 4-8 pts) Find each sum in a closed form. Allowed key strokes: power ' b. .ik". Use the identity (k 1)4 - k4-4k3 +6k2 + 4k +1 Find your answer as a polynomial that is not factored Lik-1 k3k. Find the answer in the form of .. polynomial in n.) 3An +...constant. similarly to Activity 2-2. Enter your answer completing the two missing parts. LA-1 k 23k. Find the answer in the form of C. d k= -.. constant. Enter your answer completing the two polynomial inn)3An- missing parts