Question

PLEASE, NEED ALGEBRA HELP WILL MEDAL!!!

Which of the following sums is an expansion of this series?

Answer 1

substitute i=1,2,..
2^(2*1)+2^(2*2)+2^(2*3)+...2^(2*50)

Answer 2

I dont understand..

Answer 3

sigma means summation.
take 2^(2i)
replace i with 1,2,3,..50 and add all terms
i.e., the answer

Answer 4

....um. Alright..