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jenni_fowler

evaluate 2x^-1y^3 if x=2 and y=-1

  • 2 years ago
  • 2 years ago

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  1. Tomas.A
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    insert 2 instead of x and insert -1 instead of y

    • 2 years ago
  2. jenni_fowler
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    \[2(2)^{-1}-1^{3}\]

    • 2 years ago
  3. jenni_fowler
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    like that now what do i do

    • 2 years ago
  4. anilorap
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    \[2(2)^{-1}(-1)^{3}\]

    • 2 years ago
  5. Tomas.A
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    \[n^{-1}=\frac{1}{n}\] \[n^3=n\cdot n\cdot n\]

    • 2 years ago
  6. jenni_fowler
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    okay i understand that part i just need help with the combined part

    • 2 years ago
  7. Tomas.A
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    so just multiply and subtract answers you get

    • 2 years ago
  8. jenni_fowler
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    (\[1/4* 1^{-3}\]

    • 2 years ago
  9. jenni_fowler
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    im confused

    • 2 years ago
  10. anilorap
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    \[x^{-1}= 1/x\] so |dw:1324153439822:dw|

    • 2 years ago
  11. jenni_fowler
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    wait \[1/4(1^{3})\]

    • 2 years ago
  12. anilorap
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    plugging your numbers

    • 2 years ago
  13. anilorap
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    |dw:1324153490541:dw|

    • 2 years ago
  14. anilorap
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    |dw:1324153521385:dw|

    • 2 years ago
  15. anilorap
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    what you think?

    • 2 years ago
  16. jenni_fowler
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    -1

    • 2 years ago
  17. anilorap
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    yes

    • 2 years ago
  18. jenni_fowler
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    thanks soo much

    • 2 years ago
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