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Resistance to motion F of a moving vehic...

Resistance to motion F of a moving vehicle is given by `F = (5)/(x) + 100x`. Determined the minimum value of the resistance.

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The correct Answer is:
`20 sqrt5`
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PREMIERS PUBLISHERS-APPLICATIONS OF DIFFERENTIAL CALCULUS-Problems For Practice (Answer the following question)
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  17. Obtain Maclaurin's series for f(x) = log sec x

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