→ feishunhui :感謝再感謝 09/18 23:08
(1)
h(4) = h(2+2) = g(2+1) = g(3) = g(7-4) = f(7+1) = f(8) = 8^2+2*8-3 = 77
(2)
f[g(x)] = [g(x)]^3-2*[g(x)]+3 = (x-1)^3-2*(x-1)+3 = x^3-3x^2+x+4
f(2) = 2^3-2*2+3 = 7, g(7) = 7-1 = 6
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