Jika f(x)=x^2+3x dan g(x)=x-12 maka tentukan nilai (fog)(8)? jelaskan caranya
Ichsanpasuruan
(fog)(x) = f [g(x)] {betulkah ?? :D / kalo salah kasih tau yah :D} (fog)(8) = f [g(8) ] { cari nilai g(8) } = f [ (8) - 12 ] (masukkan nilai x ke fungsi g "g(x) = x - 12) = f [ -4 ] = (-4)^2 + 3(-4) {masukan nilai x ke dalam fungsi f(x)} = 16 - 12 = 4 {jawaban langsung tanpa mencari fungsi (fog)(x) dulu}
(fog)(8) = f [g(8) ] { cari nilai g(8) }
= f [ (8) - 12 ] (masukkan nilai x ke fungsi g "g(x) = x - 12)
= f [ -4 ]
= (-4)^2 + 3(-4) {masukan nilai x ke dalam fungsi f(x)}
= 16 - 12
= 4 {jawaban langsung tanpa mencari fungsi (fog)(x) dulu}