求反函数 f(x)=((x+2))/((x+12))

解答

求反函数

f (x) = \frac{( x + 2 )}{( x + 12 )}

\frac{2 - 12 x}{x - 1}

求解步骤

y = \frac{x + 2}{x + 12}

用

y

替代

x

x = \frac{y + 2}{y + 12}

求解

y, x = \frac{y + 2}{y + 12}

\frac{2 - 12 x}{x - 1}

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