Question

Найдите производную: у= 3х-1 / х+2

Answer 1

ну тут по формуле 
(u/v)` = (u`v - uv`)/v^2
(3x-1/x+2)` = [3(x+2) - (3x-1)]/(x+2)^2 =
= [3x+6-3x+1]/(x+2)^2
= 7/(x+2)^2