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    tzahra's Avatar
    tzahra Posts: 1, Reputation: 1
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    #1

    Mar 18, 2010, 12:31 PM
    f(x)-2x square root (x+4)
    and show that f'(x)=0 at some point between the two intercepts
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Mar 19, 2010, 09:05 AM

    1. Find the two intercepts.
    2. Find f'(x).
    3. Solve for f'(x)=0
    4. If the x coordinate of what you solved for f'(x) is between the two intercepts, then you have your proof.
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