Diketahui fungsi f(x) = 3x − 1 dan g(x) = 2x2 + 3. Tentukan nilai dari komposisi fungsi (g o f)(1)

f(x) = 3x - 1
g(x) = 2x² + 3

(g o f) (1)
= g(f(1))
= g(3 - 1)
= g(2)
= 2(2)² + 3 = 8 + 3 = 11

f (x) = 3x - 1
g (x) = 2x² + 3

gof (x)
= g (f (x))
= g (3x - 1)
= 2 (3x - 1)² + 3
= 2 (9x² - 6x + 1) + 3
= 18x² - 12x + 2 + 3
= 18x² - 12x + 5

Nilai gof (1)
= 18x² - 12x + 5
= 18 (1)² - 12 (1) + 5
= 18 - 12 + 5
= 6 + 5
= 11