Question

Найдите производную функций Y=3x^2-5x; объясните как.
y=2/(x-7)

Answer 1

y ' = (3x^2 - 5x) ' = 3(x^2)' - 5(x) ' = 3*2x - 5*1 = 6x - 5

y ' = ( 2/(x - 7))' = ((2)'(x - 7) - 2(x - 7)')/(x - 7)^2 = 
= ( 0 - 2*1)/(x - 7)^2 = - 2/(x - 7)^2