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Math Help - [SOLVED] Gradient trouble! Oh oh

  1. #1
    Lots of blah
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    [SOLVED] Gradient trouble! Oh oh

    I am really confused! How would you work out the gradient of a grph when
    y=x to the power of -1? Does anyone know how to do that?

    Also say I have the gradient rules for x squared x cubed and x to the power of 4

    x squared rule = 2x
    x cubed rule = 3x squared
    x to the power of four rule = 4x cubed.

    Would you be able to work x to the power of a from that?
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  2. #2
    Site Founder MathGuru's Avatar
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    pre calc

    It looks like you are begining calculus.

    the gradient of any graph y=x^a is a*x^(a-1)

    if this is true you can anser what is the gradient of y=x^(-1)

    [x^a is the same as x raised to the power of a]

    You should also try to come up with a rule for finding the function given the gradient.
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