Using differentials, find the approximate values of:
Find the approximate values of
Let y =√x.
Let x =19 and Δx = 0.5.
As y = √x.
⇒
We, know
∴
∴ Δy = 0.0357
Also,
Δy = f(x+Δx)-f(x)
⇒ 0.0357 = √49.5 – 7
⇒ √49.5 = 7.0357.