求反函数 4-sqrt(1-x)

解答

求反函数

4 - 1 - x

- x^{2} + 8 x - 15

求解步骤

y = 4 - 1 - x

用

y

替代

x

x = 4 - 1 - y

求解

y, x = 4 - 1 - y

- x^{2} + 8 x - 15

in v erse f (x) = \frac{1}{4} x + \frac{1}{2}

in v erse y = 28.117 x^{0.25}

in v erse 1 - 4 x^{3}

in v erse f (x) = x^{3} - \frac{5}{6}

in v erse f (x) = \frac{1}{3 ( x - 5 )}