Matematika wajib kelas X Komposisi fungsi

Matematika wajib kelas X Komposisi fungsi

$(gof)(x) = g(f(x)) \ = {(f(x))}^{2} - 1 \ = {(2 + x)}^{2} - 1 \ = (4 + 4x + {x}^{2} ) - 1 \ = {x}^{2} + 4x + 3$

$(hogof)(x) = h(g(f(x)) \ = 2g(f(x)) \ = 2( {x}^{2} + 4x + 3) \ = 2 {x}^{2} + 8x + 6$