Question

Express 1+2+4+8+16+32 in sigma notation

Answer 1

\[2^0+2^1+2^2+2^3+2^4+2^5+\cdots \]
Do you see this pattern?

Answer 2

Oh, is it 2^k?

Answer 3

\[\sum_{k=0}^{5}2^k \text{ yep! }\]

Answer 4

Thanks for your help!