Question

Soal latihan unit 1 fungsi komposisi dan fungsi invers spm matematika sma program ipa
pake caranya

Answer 1

11) (gof)(1) = g(f(1)) = g[(5-3)/(1+2)] = g(2/3) = 6(2/3)-7 = 4-7 = -3

12) (gof)(x) = 2x^2+4x+5

g(f(x)) = 2x^2+4x+5

2.f(x)+3 = 2x^2+4x+5

2.f(x) = 2x^2+4x+5-3

2.f(x) = 2x^2+4x+2..(kedua ruas dibagi 2)

f(x) = x^2+2x+1

f(-1) = (-1)^2+2(-1)+1 = 1-2+1 = 0