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Math Help - Pre-Calc : Difference Quadrant help!

  1. #1
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    Pre-Calc : Difference Quadrant help!

    Ok, So I got two problems I have no clue how to do or finish the first I got far on....

    First

    f(x) = 1/x+7
    f(x+h) = 1/(x+h)+7

    My work...

    [ 1/(x+h)+7 ] - [ 1/x+7 ]
    _____________________

    h/1

    Skip few steps.... Then

    1(x+7) - (x+h)+7 / h [(x+h)+7](x+70

    Dont know where to go from there.....

    Second problem have no clue where to start or finish...

    f(x) = Square Root of x+7



    Help would be very appreciated!
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  2. #2
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    Quote Originally Posted by ClearSights View Post
    Ok, So I got two problems I have no clue how to do or finish the first I got far on....

    First

    f(x) = 1/x+7
    f(x+h) = 1/(x+h)+7

    My work...

    [ 1/(x+h)+7 ] - [ 1/x+7 ]
    _____________________

    h/1

    Skip few steps.... Then

    1(x+7) - (x+h)+7 / h [(x+h)+7](x+70

    Dont know where to go from there.....

    Second problem have no clue where to start or finish...

    f(x) = Square Root of x+7



    Help would be very appreciated!
    Is the first \frac{1}{x + 7} or \frac{1}{x} +7?

    Is the second \sqrt{x + 7} or \sqrt{x} + 7?
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