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    Farazthesizzler's Avatar
    Farazthesizzler Posts: 1, Reputation: 1
    New Member

    Jan 23, 2018, 01:24 AM
    Help with the point of the curve(differentiation)
    Question: Find the point on the curve y=x2+1 that is closest to the point (18,1).
    Please see the image and thatís where Iím stucked- after taking the first derivate. Please solve it further step by step completely. Itíd mean a lot
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    ebaines's Avatar
    ebaines Posts: 12,132, Reputation: 1307

    Jan 29, 2018, 07:21 AM
    All you need do is find the value for x that makes the numerator of the derivative equal to zero, in other words that satisfies the equation . In general solving a cubic equation can be difficult, but in this case it's pretty easy to guess the correct answer. Give it a try...

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