Question

найти производные функции y=2lnx/x+3

Answer 1

$y'=( frac{2lnx}{x}+3)' = frac{2ln'x*x-2lnx*x'}{x^2} =frac{2-2lnx}{x^2}$
$y'(1)= frac{2-2*ln(1)}{1^2} =2$