mohon bantuan dan penjelasannya kak, terima kasih banyak
Penjelasan dengan langkah-langkah:
f(x) = (x - 1)/(x + 4)
g(x) = 2x + 5
(gof)(x) = g(f(x))
(gof)(x) = 2[(x - 1)/(x + 4)] + 5
(gof)(x) = [(2x - 2)/(x + 4)] + 5
(gof)(a) = [(2a - 2)/(a + 4)] + 5
(gof)(a) = 5
[(2a - 2)/(a + 4)] + 5 = 5
[(2a - 2)/(a + 4)] = 5 - 5
(2a - 2)/(a + 4) = 0
2a - 2 = 0
2a = 2
a = 1
" maaf kalau salah "
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