Question

Aceste exerciții va rog​

Answer 1

Răspuns:

Explicație pas cu pas:

d)

2^2019 + 2^2020 + 2^2021 = 2^2019*(1 + 2 + 4) = 7*2^2019

32^404 = (2^5)^404 = 2^2020

0,5 = 5/10 = 1/2

7*2^2019/x = 2^2020/(1/2) = 2^2021

x = 7*2^2019/2^2021 = 7/4

e)

1 + 2 + 3 + ...+ 102 = 102*103/2 = 51*103

0,(3) = 3/9 = 1/3

(1/3)/103 = 1/3*103

x/51*103 = 1/3*103

x = 51*103/3*103 = 51/3 = 17