Question

найти производную
y=3x-2x^2-7
y=2x+3/x
y=3sinx
y=(5-2x)(2x+5)

Answer 1

y'=3-4x

y'=2+3·(x^-1)'=2-3/x²

y'=3cosx

y=(5-2x) (5+2x)=25-4x²      y'= -8x