Question

26tgx-21x+п-4 производная

Answer 1

$\frac{dy}{dx} = \frac{d(26tg(x))}{dx} - \frac{d(21x)}{dx} + \frac{d(\pi)}{dx} - \frac{d(4)}{dx} = \\ \\ =26 \times \frac{1}{ {cos}^{2}(x) } - 21 + 0 - 0 = \frac{26}{ {cos}^{2}(x) } - 21$
Готово.