Question

Найдите производную функции.

Answer 1

9) f'(x) = Cosx -3/x² -4
13) f'(x) = (-7(5x+4)-(1-7x)*5)/(5x+4)² = (-35x -20 -5 +35x)/( 5x+4)²=
=-25/(5x+4)²
15) f'(x) =( 3x^4*√x - (3x^5-1)*1/(2√x))/x.