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Math Help - can somebody help with this problem tomorrow i got test :S

  1. #1
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    Post can somebody help with this problem tomorrow i got test :S

    8x5-3x4+7x3-2x2+2x-1 the "x" is -1/2 as fraction




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  2. #2
    MHF Contributor MarkFL's Avatar
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    Re: can somebody help with this problem tomorrow i got test :S

    Given:

    f(x)=8x^5-3x^4+7x^3-2x^2+2x-1

    I take it you are to find:

    f\left(-\frac{1}{2} \right)=8\left(-\frac{1}{2} \right)^5-3\left(-\frac{1}{2} \right)^4+7\left(-\frac{1}{2} \right)^3-2\left(-\frac{1}{2} \right)^2+2\left(-\frac{1}{2} \right)-1=

    -\frac{8}{32}-\frac{3}{16}-\frac{7}{8}-\frac{2}{4}-\frac{2}{2}-1=

    Can you finish?
    Thanks from uran and Petrus
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  3. #3
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    Re: can somebody help with this problem tomorrow i got test :S

    Its 112/32 or ?
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  4. #4
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    Re: can somebody help with this problem tomorrow i got test :S

    Hello hope u can read my style ^^can somebody help with this problem tomorrow i got test :S-img_0816.jpg

    ehmm i did write it kinda not good but the step when u get all the bottom to 32 u can also write it as
    (-8-6-28-16-32-32)/32

    HOPE IT HELP
    Thanks from uran
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