jika (1/4)^x+2=3√8^2x-1 , nilai 81^x=

(1/4)^(x + 2) = ³√8^(2x - 1)
2^-2(x + 2) = 2^3(2x - 1)/3
-2(x + 2) = 2x - 1
-2x - 2x = 4 - 1
-4x = 3
x = -3/4

81^x
= (3^4)^-3/4
= 3^-3
= 1/3^3
= 1/27