Question

[Nguyen The Huy]

tính tổng M biết 2+2^2+2^3+...+2^99+2^100

Answer 1

[phan the cuong]

2M= 2^2 +2^3 +....+2^100 + 2^101

2M - M = (2^2 + 2^3 +....+2^100 +2^101) - (2 +2^2 + 2^3 +...+2^99 +2^100)

        M = 2^101 - 2

  Vậy M = 2^ 101 -2

k mình nha