求反函数 sqrt(5x+15)

解答

求反函数

5 x + 15

\frac{x ^{2} - 15}{5}

求解步骤

y = 5 x + 15

用

y

替代

x

x = 5 y + 15

求解

y, x = 5 y + 15

\frac{x ^{2} - 15}{5}

in v erse f (x) = 4 - e^{- 5 x}

in v erse f (x) = x + \frac{12}{x}

in v erse f (x) = \frac{( x + 2 )}{x + 8}

in v erse f (x) = d (x) = 2 x - 4

in v erse f (x) = 9 lo g_{2} (x) + 23