Question

S = 2¹ + 2² + 2³ + .... + 2²⁰¹⁵

Hãy rút gọn S

Answer 1

2S=2^2+2^3+....+2^2015+2^2016

=>2S-S=2^2016-2

=>S=2^2016-2 vậy S=2^2016-2

tick nha

Answer 2

2S=2²+2³+...+2²⁰¹⁶

2S-S=2²+2³+...+2²⁰¹⁶-2-2²-...-2²⁰¹⁵

S=2²⁰¹⁶-2