Let-f-x-sin-3-2x-for-pi-4-x-pi-4-then-Df-1-1-8-a-b-b-so-a-b-

Question Number 161114 by cortano last updated on 12/Dec/21

L e t f (x) = \sin^{3} (2 x) f o r - \frac{π}{4} ⩽ x ⩽ \frac{π}{4}

t h e n {D f}^{- 1} (\frac{1}{8}) = \frac{a}{b \sqrt{b}} s o {\begin{cases} a = ? \\ b = ? \end{cases}