diketahui fungsi g(x)=3x+11 dan (gof)(x)=3x^2-6x+8 . nilai dari f(3) =....

langsung aja y

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

3x² - 6x + 8 = 3f(x) + 11

3x² - 6x + 8 - 11 = 3f(x)

3(x² - 2x - 1) = 3f(x)

x² - 2x - 1 = f(x)

f(3) = 3² - 2(3) - 1
f(3) = 9 - 6 - 1
f(3) = 2

semoga berguna +_+