Question

s=1+2+2^2+2^3+....+2^10

Answer 1

$S=\frac{2^{10+1}-1}{2-1}=2^{11}\,-\;1$

Sau ...

S = 2¹⁰⁺¹ - 1 = 2¹¹ - 1 = 2⁵ₓ2⁵ₓ2 - 1 =32ₓ32ₓ2 - 1 = 2048-1= ...