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Math Help - Help please

  1. #1
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    Help please

    Solve equations :

    1)

    Help please-codecogseqn.png

    2)

    Help please-codecogseqn-1-.png

    3)

    Help please-codecogseqn-2-.png


    Please Help Me . If i solve these , i will have the best mark ever in math in my entire life !
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  2. #2
    Forum Admin topsquark's Avatar
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    Re: Help please

    Quote Originally Posted by fatlind View Post
    Solve equations :

    1)

    Click image for larger version. 

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    2)

    Click image for larger version. 

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    3)

    Click image for larger version. 

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    Please Help Me . If i solve these , i will have the best mark ever in math in my entire life !
    This sounds like a graded assignment. All we can do is give you pointers. The main thing is to show your work. Have you been able to make any progress on these?

    -Dan
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  3. #3
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    Re: Help please

    Quote Originally Posted by topsquark View Post
    This sounds like a graded assignment. All we can do is give you pointers. The main thing is to show your work. Have you been able to make any progress on these?

    -Dan
    Yes . But everything I've done won't worth . someone else
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  4. #4
    Forum Admin topsquark's Avatar
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    Re: Help please

    Quote Originally Posted by topsquark View Post
    This sounds like a graded assignment. All we can do is give you pointers. The main thing is to show your work. Have you been able to make any progress on these?

    -Dan
    Let's look at the first one. For starters if |y| \leq k the we know that -k \leq y \leq k. So your first problem becomes:
     \left | \frac{x}{x - 1} \right | \leq 1 \implies -1 \leq \frac{x}{x - 1} \leq 1

    What can you do with this?

    -Dan
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  5. #5
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    Re: Help please

    Keep track of the direction of the inequalities. They are reversed if you multiply the inequality by a negative number. So, if you want to multiply across the inequality by x-1, you need to consider two cases: when x-1>0 and when x-1<0.
    Thanks from topsquark
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