Compare Sn = 12 + 24 + 38 + 416 + +N2n (n is any natural number) and the size of 2______ .

Compare Sn = 12 + 24 + 38 + 416 + +N2n (n is any natural number) and the size of 2______ .

Sn = 12 + 24 + 38 + 416 + +N2n, then 2Sn = 1 + 12 + 34 + 48 + 516 + +n2n−1,∴2Sn-Sn=1+14+18+… +So the answer is: SN < 2