Question

Let y = 4 x^2 + 5 x + 3.
Find the differential dy when x= 1 and dx = 0.2
Find the differential dy when x= 1 and dx = 0.4

Answer 1

i got it, it's 2.6 and 5.2 thanks anyway guys

Answer 2

\[\frac{dy}{dx}=f'(x) \\ dy=f'(x)dx\]

Answer 3

Ok, good job :)