which of the following express 1+2+4+8+16+32 in sigma notation?
a.) 2^(k-1) from k=1 to 6
b.) 2^k from k=0 to 5
c.) 2^(k+1) from k= -1 to 4
I don't understand, isn't it all of them??
Also, use formulas to evaluate:
(1-k)*(2-k) from k=0 to k=n
I'm confused on this problem because I only know formulas for summations from k=1 to k=n. Anyone know how to do this one?