求反函数 f(x)=4sqrt(2x+4)-3

解答

求反函数

f (x) = 4 2 x + 4 - 3

\frac{x ^{2} + 6 x - 55}{32}

求解步骤

y = 4 2 x + 4 - 3

用

y

替代

x

x = 4 2 y + 4 - 3

求解

y, x = 4 2 y + 4 - 3

\frac{x ^{2} + 6 x - 55}{32}

d o main f (x) = ln (x^{2} + x - 2)

e x t re m e f (x) = \frac{x ^{2} + x + 1}{x}

d o main (- x^{2} + 16) (x + 3)

d o main f (x) = \frac{3 x ^{2}}{x ^{2} - 9}

in v erse y = \frac{3 x - 1}{2 x + 8}