Question

взять производную от (625/х)^2

Answer 1

$f'(x)=((frac{625}{x})^2)'=2bullet(frac{625}{x})^{2-1}bullet625bullet(frac{1}{x})'=frac{1250}{x}bullet(-frac{625}{x^2})=\\=-frac{781250}{x^3}.$