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stevenl723

  • 2 years ago

The sum of a number and its reciprocal is 5 1/5.

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  1. UnkleRhaukus
    • 2 years ago
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    take a guess

  2. stevenl723
    • 2 years ago
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    do I have to convert the mixed fraction to a improper fraction?

  3. UnkleRhaukus
    • 2 years ago
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    if you can't see the answer staring at you

  4. lgbasallote
    • 2 years ago
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    sadly, i cannot see the answer staring at me either

  5. stevenl723
    • 2 years ago
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    \[x^2+1-5\frac{1 }{ 5}=0?\]

  6. zzr0ck3r
    • 2 years ago
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    5 and 1/2 what does and mean? and what is the recipicle of 5?

  7. stevenl723
    • 2 years ago
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    1/5

  8. zzr0ck3r
    • 2 years ago
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    so what does and mean?

  9. stevenl723
    • 2 years ago
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    but I don't get what the question is asking.. it says what is the reciprocal of 5 and 1/5... but how is it 5 or 1/5?

  10. zzr0ck3r
    • 2 years ago
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    its asking what two numbers can you add together and get 5 and 1/2 or what numbers can you add together and get 5+1/2 note: 5 is the recipicle of 1/5 and vice versa

  11. lgbasallote
    • 2 years ago
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    5 and 1/5*

  12. zzr0ck3r
    • 2 years ago
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    :)

  13. zzr0ck3r
    • 2 years ago
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    5+1/5 = 5 and 1/5 5^(-1) = 1/5

  14. zzr0ck3r
    • 2 years ago
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    hence "the answer is stairing you in the face"

  15. stevenl723
    • 2 years ago
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    OH.... so its 5+1/5 not 5 1/5... i was thinking something differently.. thanks

  16. stevenl723
    • 2 years ago
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    s othe answer is 5 or 1/5 hahaha

  17. stevenl723
    • 2 years ago
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    So there is no real calculation needed for this question?

  18. UnkleRhaukus
    • 2 years ago
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    \[x+\frac 1x=5~\frac 15\]\[\frac {x^2+1}x=\frac {26}5\]\[x^2+1=\left(\frac {26}5\right)x\]\[x^2-\left(\frac{26}5\right)x+1=0\] \[x_{1,2}=\frac{-(-\frac{26}5)\pm\sqrt{(-\frac{26}5)^2-4}}{2}\]\[\qquad=\frac{\frac{26}5\pm\sqrt{\frac{676}{25}-4}}{2}\]\[\quad=\quad...\]

  19. AmberCat21
    • 2 years ago
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    x+ 5/26

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