Question

Se A= (9^-1×3^-3)^-1×(-1/3)^4,o valor de A é:

Answer 1

A = (1/9 x 1/3^3) - 1 x 1/81
A = (1/9 x 1/27) - 1/81
A = 1/243 - 1/81

Aí tira MMC de 81 e 243 que é 243

A = 1 - 3/243
A = -2/243