f(3x-1)=9x+2 tentukan f(x) dan f(3)

Langsung aja y

f(3x-1) = 9x+2

misal :
3x - 1 = a
x = a+1 / 3

soal menjadi →
f(a) = 9(a+1 / 3) + 2
f(a) = 3(a+1) + 2
f(a) = 3a + 3 + 2

f(x) = 3x + 5
f(3) = 3(3) + 5
f(3) = 9 + 5
f(3) = 14

Semoga berguna +_+