diketahui fungsi g(x)=3x-7 dan (gof) (x) =3x²-15x-4. nilai dari f(2)=

langsung aja y

(gof)(x) = g{f(x)}

3x² - 15x - 4 = 3f(x) - 7

3x² - 15x - 4 + 7 = 3f(x)

3x² - 15x + 3 = 3f(x)

3(x² - 5x + 1) = 3f(x)

x² - 5x + 1 = f(x)

maka
f(2) = 2² - 5(2) + 1
f(2) = 4 - 10 + 1
f(2) = -6 + 1
f(2) = -5

semoga berguna +_+