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-   -   Gradient of Tangents Calculus (https://www.askmehelpdesk.com/showthread.php?t=419017)

  • Nov 24, 2009, 01:18 PM
    stewartlindsay
    Gradient of Tangents Calculus
    Find the gradient of the tangent to the curve y= square root x plus 8/square root x at the point (4,6)
  • Nov 24, 2009, 01:26 PM
    galactus


    Please use proper grouping so we know what you mean. I knew this by plugging in x=4 and seeing if I got 6.

    To find the gradient, we need the slope at that point.

    Find the derivative of y, then plug in x=4. That should be the slope at that point.

    Can you find the derivative of y?

    The derivative may be easier to find by rewriting as


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