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anonymous

  • one year ago

What is the value of y^-5/x^-3 for x = 2 and y = -4?

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  1. sepeario
    • one year ago
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    So we have the equation \[\frac{ -4^{-5} }{ 2^{-3} }\]

  2. sepeario
    • one year ago
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    Which then means \[\frac{ (-4*-4*-4*-4*-4)^{-1} }{ (2*2*2)^{-1} }\]

  3. sepeario
    • one year ago
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    Can you evaluate that?

  4. anonymous
    • one year ago
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    -256/-8

  5. sepeario
    • one year ago
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    Check your answer. What is -4^5. And where did you get the negative from the bottom?

  6. anonymous
    • one year ago
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    idk what im doing

  7. sepeario
    • one year ago
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    haha no stress.

  8. anonymous
    • one year ago
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    -1024/8

  9. anonymous
    • one year ago
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    ohhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh 128

  10. sepeario
    • one year ago
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    Yes, but remember how both of them are two the power of negative 1? That means that they are inverse, giving you the fraction 8/-1024

  11. anonymous
    • one year ago
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    but would it be -128?

  12. sepeario
    • one year ago
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    No, the fraction is inversed. The answer isn't -1024/8.

  13. anonymous
    • one year ago
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    -1/128

  14. sepeario
    • one year ago
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    Yes! well done.

  15. anonymous
    • one year ago
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    yayyyyyy thank you :))))

  16. sepeario
    • one year ago
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    all good.

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