Using differentials, find the approximate value of each of the following up to 3 places of decimal.


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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