求反函数 f(x)=2cos(ln(1-x))+1

解答

求反函数

f (x) = 2 cos (ln (1 - x)) + 1

- e^{a r c c o s (\frac{x - 1}{2})} + 1

求解步骤

求解

cos (ln (1 - x)), y = 2 cos (ln (1 - x)) + 1

cos (ln (1 - x)) = \frac{y - 1}{2}

cos (a) = b \Rightarrow a = arccos (b)

ln (1 - x) = arccos (\frac{y - 1}{2})

求解

x, ln (1 - x) = arccos (\frac{y - 1}{2})

- e^{a r c c o s (\frac{y - 1}{2})} + 1

替代

y = x

- e^{a r c c o s (\frac{x - 1}{2})} + 1

p a r i t y f (x) = 4 x^{3} + 2 x^{2}

in v erse f (x) = 3 x + 9

in v erse f (x) = 9 - 9 x

a sy m pt o t es - 2 (x - 2)^{2}

in v erse f (x) = 5 \frac{3 x - 1}{x - 2}