Question

resolver as equacoes exponencias no conjunto real a) 3ˣ⁻¹+3ˣ⁺¹=90
B) 4²=32

Answer 1

Ola Anderson

a)

3^(x - 1) + 3^(x + 1) = 90 

3^x/3 + 3*3^x = 90 

3^x +  9*3^x = 270 

10*3^x = 270

3^x = 27 = 3^3

x = 3

b) incompleto