Question

нужна помощь! Найдите производную функции

Answer 1

Ответ:

$y = \frac{ {(4 - 8x)}^{3} }{ {(6 - 5 {x}) }^{4} }$

$y' = \frac{( {(4 - 8x)}^{3})' {(6 - 5x)}^{4} - {((6 - 5x)}^{4})' {(4 - 8x)}^{3} }{ {(6 - 5x)}^{8} } = \\ = \frac{3 {(4 - 8x)}^{2} \times ( - 8) {(6 - 5x)}^{4} - 4{(6 - 5x)}^{3} \times ( - 5) {(4 - 8x)}^{3} }{ {(6 - 5x)}^{8} } = \\ = \frac{ {(4 - 8x)}^{2} {(6 - 5x)}^{3} ( - 24(6 - 5x) + 20(4 - 8x))}{ {(6 - 5x)}^{8} } = \\ = \frac{ {(4 - 8x)}^{2}( - 144 + 120x + 80 - 160x) }{ {(6 - 5x)}^{5} } = \\ = \frac{ {(4 - 8x)}^{2}( - 40x - 64) }{ {(6 - 5x)}^{5} } = - \frac{ {(4 - 8x)}^{2}(40 + 6x) }{ {(6 - 5x)}^{5} }$