求反函数 f(x)=2x^2-2x-12

解答

求反函数

f (x) = 2 x^{2} - 2 x - 12

\frac{1 + 2 x + 25}{2}, \frac{1 - 2 x + 25}{2}

求解步骤

y = 2 x^{2} - 2 x - 12

用

y

替代

x

x = 2 y^{2} - 2 y - 12

求解

y, x = 2 y^{2} - 2 y - 12

\frac{1 + 2 x + 25}{2}, \frac{1 - 2 x + 25}{2}

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