Using differentials, find the approximate values of:
Find the approximate values of 
.
Let 
.
Let x =27 and Δx = 2.
As 
⇒ 
We, know
⇒ 
∴ 
⇒ 
⇒ 
∴ Δy = 0.074
Also,
Δy = f(x+Δx)-f(x)
∴ 
⇒ 
⇒ 
1
Using differentials, find the approximate values of:
Find the approximate values of .
Let .
Let x =27 and Δx = 2.
As
⇒
We, know
⇒
∴
⇒
⇒
∴ Δy = 0.074
Also,
Δy = f(x+Δx)-f(x)
∴
⇒
⇒