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Question

Using differentials, find the approximate value of the following up to 3 places of decimal.
49.5

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Solution

49.5
Consider f(x)=xf(x)=12x
Let x = 49 and Deltax=0.5
Now f(x+Δx)f(x)+Δxf(x)
x+Δxx+12x×Δx
49.549+0.5249=7+05140.=7+0.03649.57.036


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