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need a question answered

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  1. Offline

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    anyone know the answer to this.

    X^0.4= 2.3076
    so whats x?

    and the working out?
  2. Offline

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    x^{\frac{2}{5}} = a


    x = a^{\frac{5}{2}}
  3. Offline

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    (Original post by imMcLovin)
    anyone know the answer to this.

    X^0.4= 2.3076
    so whats x?

    and the working out?
    Have you studied logarithms?
  4. Offline

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    (Original post by raheem94)
    Have you studied logarithms?
    no its just a general question i need answered for my cousin
  5. Offline

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    (Original post by TenOfThem)
    x^{\frac{2}{5}} = a


    x = a^{\frac{5}{2}}
    hi thanks for the reply is there any specific way to work that out or is that just a general rule
  6. Offline

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    (Original post by imMcLovin)
    no its just a general question i need answered for my cousin
    No logs needed ... see my post 2
  7. Offline

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    (Original post by imMcLovin)
    hi thanks for the reply is there any specific way to work that out or is that just a general rule
    power of a is the reciprocal of the power of x
  8. Offline

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    (Original post by imMcLovin)
    no its just a general question i need answered for my cousin
    So do it as tenofthem said.

    0.4=2/5,
     x^{0.4} = 2.3076 

x^{\frac25} = 2.3076 

 x^{\frac25 \times \frac52} = 2.3076^{\frac52}
  9. Offline

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    (Original post by raheem94)
    So do it as tenofthem said.

    0.4=2/5,
     x^{0.4} = 2.3076 

x^{\frac25} = 2.3076 

 x^{\frac25 \times \frac52} = 2.3076^{\frac52}
    ok thanks so thats the final answer right?!
  10. Offline

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    well you need to do the sum
  11. Offline

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    (Original post by TenOfThem)
    well you need to do the sum
    can you do the full sum for me plz. i havent studied maths in like five years this is for my cousin
  12. Offline

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    (Original post by imMcLovin)
    ok thanks so thats the final answer right?!
    Sorry, i can't give you the answer here. But infact my previous post makes the answer very obvious.

      x^{\frac25 \times \frac52} = 2.3076^{\frac52} 

x = 2.3076^{\frac52}

    Can you do it now?

    Hint: use a calculator
  13. Offline

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    ok got it. thanks

    /end thread

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