Question

Aflati numarul natural x stiind ca:
a)2^x=8
b)2^x•4=32
c)8^x•16=128

Answer 1

a)  2ˣ = 8 = 2³ ==>   x = 3

b)  2ˣ x 4 = 32

 2ˣ = 32 : 4

2ˣ = 8

2ˣ = 2³ ==>   x = 3

c)  8ˣ x 16 = 128

8 ˣ = 128 : 16

8ˣ = 8 ==>   x = 1