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Math Help - f(x)

  1. #1
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    f(x)

    f(x)=4x+3
    solve f(x+h)-f(x)/h
    Last edited by Nightasylum; September 27th 2009 at 09:42 PM.
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  2. #2
    Senior Member MacstersUndead's Avatar
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    (x+h)-f(x)/h

    I cannot solve this, since there is nothing to solve. What's it equal to? Do you mean simplify?
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  3. #3
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    it says break it down to one number.
    4x+3 is given
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  4. #4
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    Find F idk im losted
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  5. #5
    Senior Member MacstersUndead's Avatar
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    Well,
    (x+h)-f(x)/h is equal to

    = [h(x+h) - (4x + 3)] / h

    = [h^2 + hx - 4x + 3] / h

    = [h^2 + (h-4)x + 3) / h

    EDIT:// with the question edited, it is now clear.
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  6. #6
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    Do you mean?

    f(x)=4x+3

     \frac{f(x+h)-f(x)}{h}

    if so...

    Spoiler:

     \frac{(4(x+h)+3)-(4x+3)}{h}

     \frac{4x+4h+3-4x-3}{h}

     \frac{4h}{h}

     4
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  7. #7
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    I dont get where the 4 come from
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  8. #8
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    The h's cancelled.
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