f'(u) = \frac(1 + 9u)(1 - 9u)(1 + 9u)^4 = \frac1 - 81u^2(1 + 9u)^3. - AMAZONAWS

📅 March 11, 2026 👤 scraface

Mar 11, 2026

$f'(u) = \frac{(1 + 9u)(1 - 9u)}{(1 + 9u)^4} = \frac{1 - 81u^2}{(1 + 9u)^3}.$