Ada yang bisa bantu?

9^(x-1) = 3^(1-4x)
3^2^(x-1) = 3^(1-4x)
3^(2x-2) = 3^(1-4x)
Maka :
2x-2 = 1 - 4x
2x + 4x = 1 + 2
6x = 3
X = 1/2

F(y) = y^2 + 2(1/2)y + 4(1/2)^2
= y^2 + y + 1

Nilai minimum ketika turunan f(y) <0
Turunan f(y) = 2y + 1
0 = 2y + 1
Y = -1/2

Nilai minimum = (-1/2)^2 + (-1/2) + 1 = 1/4 -1/2 + 1 = 3/4