Question

Jika 3ˣ⁻²ⁿ= 1/81 dan 2ˣ⁻ⁿ= 16, maka nilai x + n =....

Answer 1

3^(x-2n) =3^(-4) --> x - 2n = - 4 ....(1)
2^(x -n) = 2^4 --> x - n = 4.............(2)

(1) - (2) =
n = - 8
x = 4 + n = - 4

x + n = -12