let-y-x-3-2x-1-find-dy-dx-when-x-2-

Question Number 67393 by Prof 40 last updated on 26/Aug/19

l e t y = (x - 3) ϕ (2 x + 1)

f i n d d y / d x w h e n x = 2

Commented by mathmax by abdo last updated on 27/Aug/19

i f w e s u p p o s e t h a t φ i s a f u n c t i o n w e g e t

y^{^{'}} (x) = φ (2 x + 1) + 2 (x - 3) φ^{^{'}} (2 x + 1) \Rightarrow

y^{^{'}} (2) = φ (5) - 2 φ^{^{'}} (5)