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Math Help - Equation of a tangent line

  1. #1
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    please help!

    Find equation of tangent line to y=sqrt(x^2+15) at x=1
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  2. #2
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    Quote Originally Posted by bobby77
    Find equation of tangent line to y=sqrt(x^2+15) at x=1
    Ok. So to make a tangent line, you are first going to need the general derivative and a point to put everything into point slope form. You have your function. Now differentiate and plug in x=1 into the original equation to find your y value. You then have everything you need.
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