Question

Resolva as equações exponenciais
2^×+1 2^×-1=20

Answer 1

Ola Sasa

2^(x + 1) + 2^(x - 1) = 20

2*2^x + 2^x/2 = 20

4*2^x + 2^x = 40

5*2^x = 40

2^x = 40/5 = 8

2^x = 2^x

x = 3