Question

9 elevado a x menos 2 igual a raiz quadrada de 27 ?? PPlease help me

Answer 1

9^x-2 = √27
3^2(x-2) = √27
3^2x-4 = √27
3^2x-4 = (3^3)^1/2.
3^2x-4 = 3^3/2
agora se resolve exponencialmente, "retirando" a base.
2x-4 = 3/2
2x = 3/2 + 4
2x = 3/2 + 8/2
2x = 11/2
x = 11/2*2
x = 11/4.
Resposta 11/4.