Use differentials to approximate: from Mathematics Application

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 Multiple Choice QuestionsShort Answer Type

361.

Use differentials to approximate:
square root of 3.968 end root




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362.

Use differentials to approximate:
square root of 25.2 end root





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363.

Use differentials to approximate:
left parenthesis 0.0037 right parenthesis to the power of 1 half end exponent







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364.

Use differentials to approximate:
square root of 36.3 end root








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365.

Use differentials to approximate:
square root of 49.7 end root









 Take space straight y equals space square root of straight x space space comma space space space space straight x space equals space 49 comma space space space space space dx space equals space δx space equals space 0.7 space space space so space that space straight x space space plus δx space equals space 49.7
Now space space space space straight y space plus space δy space equals space square root of straight x plus δx end root space space space space space space space space space space space space space space space space space space rightwards double arrow space space space space space δy space equals space square root of straight x plus δx end root space minus space straight y space equals space square root of 49.7 end root space minus space 7
rightwards double arrow space space space space space square root of 49.7 end root space equals space δy plus 7 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space... left parenthesis 1 right parenthesis

Now δy is approximately equal to dy
and    dy space equals dy over dx dx space equals space fraction numerator 1 over denominator 2 square root of straight x end fraction dx space equals space fraction numerator 1 over denominator 2 square root of 49 end fraction left parenthesis 0.7 right parenthesis space equals space fraction numerator 0.7 over denominator 14 end fraction space equals space 0.05
space therefore space space space space from space left parenthesis 1 right parenthesis comma space space space square root of 49.7 end root space equals space 0.05 space plus space 7 space space equals space 7.05.
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366.

Use differentials to approximate:
square root of 401









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367.

Use differentials to approximate:
square root of 402










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368.

Use differentials to approximate:
square root of 51











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369.

Use differentials to approximate:
square root of 26












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370. Use differentials to approximate the cube root of 28.
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