Question

найдите производную функции f(x)=(6/х-7)(х+2)

Answer 1

$y = - 6 \times \frac{1}{ {x}^{2} } \times (x + 2) + ( \frac{6}{x} - 7) \times 1 = \frac{ - 6(x + 2)}{ {x}^{2} } - \frac{6 - 7x}{x} = \frac{ - 6x - 12 + 6x - 7 {x}^{2} }{ {x}^{2} } = - \frac{(12 + 7 {x}^{2} )}{ {x}^{2} }$