А) y'=5*(1/x)'=5*(-1/x^2)=-5/x^2
б) y'=(3-5x)'=0-5=-5
в) y'=8*(sqrt(x))'=8*(1/2*sqrt(x))=4/sqrt(x)
г) y'=6*x^(6-1)=6*x^5
д) y'=2'=0
(q/(q - 5) - 2q) : (11 - 2q)/(q - 5) = (q - 2q(q - 5))/(q - 5) * (q - 5)/(11 - 2q) = (q - 2q^2 + 10q)/(11 - q) = (11q - 2q^2)/(11 - 2q) = q(11 - 2q)/(11 - 2q) = q