求反函数 f(x)=(x-5)/2

解答

求反函数

f (x) = \frac{x - 5}{2}

2 x + 5

求解步骤

y = \frac{x - 5}{2}

用

y

替代

x

x = \frac{y - 5}{2}

求解

y, x = \frac{y - 5}{2}

2 x + 5

d o main ∣ x ∣ - 2

in f l ec t i o n f (x) = \frac{4 x ^{2}}{x ^{2} - 9}

in v erse f (x) = cos (x + 1)

e x t re m e f (x) = x^{3} - 3 x + 1

d o main \frac{x}{x ^{2} - 1}