Q. 1 C4.1( 17 Votes )
Using differentials, find the approximate value of each of the following up to 3 places of decimal.
Answer :
Consider y = 
.
Let x = 1 and Δx = -0.4. Then, we get
= √0.6-1
= √0.6 = Δy + 1
Now, dy is approximately equal to Δy and is given by:
= -0.2
Therefore, the approximate value of 
is 0.8.
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