Question

Найдите производную функции

Answer 1

$f(x)=5x^{4} -7x^{3} -2\sqrt{x} \\\\f'(x)=5(x^{4} )'-7(x^{3})'-2(\sqrt{x})'=20x^{3}-21x^{2}-2*\frac{1}{2\sqrt{x}} =20x^{3}-21x^{2} -\frac{1}{\sqrt{x}}$