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Math Help - Simplify an expression with exponents.

  1. #1
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    Simplify an expression with exponents.

    Hello,
    Can a math genious please answer this question? the answer should be 2y^-1, and please show me the working...
    Thanks

    here is the question:

    16y^10 * 4y^-4 (divided by) 32y^7
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  2. #2
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    Use this: a^n*a^m=a^(n+m) and a^n/a^m=a^(n-m)
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  3. #3
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    Quote Originally Posted by IBstudent View Post
    Hello,
    Can a math genious please answer this question? the answer should be 2y^-1, and please show me the working...
    Thanks

    here is the question:

    16y^10 * 4y^-4 (divided by) 32y^7
    A better idea is for you to try to answer this question, post your working and where you are stuck. Then you might get some help - we won't do your work for you.
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  4. #4
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    Quote Originally Posted by VincentP View Post
    Use this: a^n*a^m=a^{n+m}

    and

    \frac{a^n}{a^m}=a^{n-m}
    ... It actually took longer for the site to load my reply than it did to edit this.
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  5. #5
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    Quote Originally Posted by IBstudent View Post
    Hello,
    Can a math genious please answer this question? the answer should be 2y^-1, and please show me the working...
    Thanks

    here is the question:

    16y^10 * 4y^-4 (divided by) 32y^7
    ...=(16*4/32)*y^10/(y^4*y^7)=2*y^(10-4-7)=2y^(-1)
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  6. #6
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    Quote Originally Posted by IBstudent View Post
    16y^10 * 4y^-4
    Same as 16 * 4 * y^10 * y^-4 ; so 64y^6 ; continue...
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  7. #7
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    Quote Originally Posted by Wilmer View Post
    Same as 16 * 4 * y^10 * y^-4 ; so 64y^6 ; continue...
    okay....
    so 64y^6 is equivelent to 2y^36,
    2y^36 / 32y^7 = 2y^36 / 2y^35 which gives 2y^(36-35) = 2y^1
    hehe that was close! ...... can anyone please tell me where I went wrong?
    thanks
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  8. #8
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    wait..... I got it
    GREAT METHOD!
    IT WORKED!!!!!
    thanks, I really appreciate the help everyone :-)
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