Question

|-2|¹+1-21²+...+ |-2|²⁰ =​

Answer 1

Explicație pas cu pas:

${ | - 2| }^{1} + { | - 2| }^{2} + { | - 2| }^{3} + ... + { | - 2| }^{20} = \\ = {2}^{1} + {2}^{2} + {2}^{3} + ... + {2}^{20} = {2}^{21} - 2$