Diketahui: g(x) = 2x/(x + 5) Ditanyakan: g^-1(x) Penyelesaian: g(x) = 2x/(x + 5) y = 2x/(x + 5) xy + 5y = 2x 2x - xy = 5y x(2 - y) = 5y x = 5y/(2 - y) g^-1(y) = 5y/(2 - y) g^-1(x) = 5x/(2 - x) ; x ≠ 2 |
Diketahui: g(x) = 2x/(x + 5) Ditanyakan: g^-1(x) Penyelesaian: g(x) = 2x/(x + 5) y = 2x/(x + 5) xy + 5y = 2x 2x - xy = 5y x(2 - y) = 5y x = 5y/(2 - y) g^-1(y) = 5y/(2 - y) g^-1(x) = 5x/(2 - x) ; x ≠ 2
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