diket rumus fungsi adalah f(3x-2)=6x-5. nilai f(-1) adalah

f (3x - 2) = 6x - 5
Misal :
y = 3x - 2
3x = y + 2
x = (y + 2) / 3

f (3x - 2) = 6x - 5
f (y) = 6 ((y + 2) / 3) - 5
f (y) = 2 (y + 2) - 5
f (y) = 2y + 4 - 5
f (y) = 2y - 1
f (x) = 2x - 1

Nilai f (-1)
= 2x - 1
= 2 (-1) - 1
= -2 - 1
= -3