求反函数 f(x)=sqrt(4(1-x^2))

解答

求反函数

f (x) = 4 (1 - x^{2})

- \frac{x ^{2} - 4}{4}, - - \frac{x ^{2} - 4}{4}

求解步骤

y = 4 (1 - x^{2})

用

y

替代

x

x = 4 (1 - y^{2})

求解

y, x = 4 (1 - y^{2})

- \frac{x ^{2} - 4}{4}, - - \frac{x ^{2} - 4}{4}

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