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    Hi guys, it would be great if you guys could help me answer this question.
    thanks.

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    (Original post by Chittesh14)
    Hi guys, it would be great if you guys could help me answer this question.
    thanks.

    Attachment 360039
    I am sure somebody will help you but your attachment is invalid
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    (Original post by TeeEm)
    I am sure somebody will help you but your attachment is invalid

    Sorry bro, don't know what the problem was, still works fine for me. But re-uploaded onto this post.
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    (Original post by Chittesh14)
    Hi guys, it would be great if you guys could help me answer this question.
    thanks.

    That's not a question - that's just an expression!

    Are you being asked to simplify what's written? There are several ways of going about this - one way is to start by writing what's inside the brackets as a power of some fraction. Can you do that?
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    (Original post by davros)
    That's not a question - that's just an expression!

    Are you being asked to simplify what's written? There are several ways of going about this - one way is to start by writing what's inside the brackets as a power of some fraction. Can you do that?
    Yeah, sorry I kept doing it wrong lol. I was doing something else like doing 1/4 to the power of -2 and then writing a after it. But, my brother solved it for me and it is correct. I was meant to simplify it and I got the answer as 16a^4.
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    (Original post by Chittesh14)
    Yeah, sorry I kept doing it wrong lol. I was doing something else like doing 1/4 to the power of -2 and then writing a after it. But, my brother solved it for me and it is correct. I was meant to simplify it and I got the answer as 16a^4.
    Your brother was wrong if you're saying he got 16a^4
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    (Original post by Phichi)
    Your brother was wrong if you're saying he got 16a^4
    How, that's the correct answer?
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    (Original post by Chittesh14)
    How, that's the correct answer?
    No its not. Rewrite the middle part.


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    (Original post by Chittesh14)
    How, that's the correct answer?
    It's not the same as what you wrote down in the first post!

    Can you give us a screenshot or photo of the original question?
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    (Original post by davros)
    It's not the same as what you wrote down in the first post!

    Can you give us a screenshot or photo of the original question?
    I don't know sorry my friend just needed help on the question and that's all he sent me. Therefore, I just worked out what's in the bracket and then raised it to the power of -3/4 and it face me 16a^4.


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    (Original post by Chittesh14)
    I don't know sorry my friend just needed help on the question and that's all he sent me. Therefore, I just worked out what's in the bracket and then raised it to the power of -3/4 and it face me 16a^4.


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    But it doesn't give you that

    Even if you just consider the fraction (1/4)^-3/4 = 2root2 not 16
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    (Original post by TenOfThem)
    But it doesn't give you that

    Even if you just consider the fraction (1/4)^-3/4 = 2root2 not 16
    Yeah, can u explain to me how you got there. I don't really know how to solve this question, my brother got something like that before and then he done it again to get 16a4.


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    (Original post by Chittesh14)
    Yeah, can u explain to me how you got there. I don't really know how to solve this question, my brother got something like that before and then he done it again to get 16a4.


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    The negative power means reciprocal giving 4

    The 1/4 power means fourth root giving root2

    The 3 power means cube giving 2root2


    No sign of 16
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    (Original post by Chittesh14)
    Yeah, can u explain to me how you got there. I don't really know how to solve this question, my brother got something like that before and then he done it again to get 16a4.


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    So u have 1/(1/4)^3/4 yes
    Square root to give 1/(1/2)^3/2
    Repeat again to give 1/(1/root2)^3
    Which will give the answer


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    (Original post by TenOfThem)
    The negative power means reciprocal giving 4

    The 1/4 power means fourth root giving root2

    The 3 power means cube giving 2root2


    No sign of 16
    (Original post by physicsmaths)
    So u have 1/(1/4)^3/4 yes
    Square root to give 1/(1/2)^3/2
    Repeat again to give 1/(1/root2)^3
    Which will give the answer


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    Oh right thanks guys, that's exactly what my brother done and got the answer 2 root 2. But, what happened to the a? Where does the letter a go.


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    (Original post by Chittesh14)
    Oh right thanks guys, that's exactly what my brother done and got the answer 2 root 2. But, what happened to the a? Where does the letter a go.


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    Oh yh put that in there a^3/2


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    (Original post by physicsmaths)
    Oh yh put that in there a^3/2


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    So, should the answer be 2 root 2, where is the a? lol.
    It's like root 2 multiplied by a and then to the power of 3? is that what your saying.
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    (Original post by Chittesh14)
    So, should the answer be 2 root 2, where is the a? lol.
    It's like root 2 multiplied by a and then to the power of 3? is that what your saying.
    Look we have done (1/4)^-3/4
    No multiply it by (a^-2)^-3/4
    If you use indices you should find that part extremely easy.


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    (Original post by physicsmaths)
    Look we have done (1/4)^-3/4
    No multiply it by (a^-2)^-3/4
    If you use indices you should find that part extremely easy.


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    (a^-2)^-3/4 =
    a^-2 = 1/a^2 then
    (1/a^2)^-3/4 = 1 / (1/a^2)^3/4 =
    (a^2)^3/4 = fourth root of a^2 = square root of a^2 = a, square root of a = root a.
    cube root a = a root a?

    So the answer should be 2 root 2 and a root a? im confused lol.
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    (Original post by Chittesh14)
    (a^-2)^-3/4 =
    a^-2 = 1/a^2 then
    (1/a^2)^-3/4 = 1 / (1/a^2)^3/4 =
    (a^2)^3/4 = fourth root of a^2 = square root of a^2 = a, square root of a = root a.
    cube root a = a root a?

    So the answer should be 2 root 2 and a root a? im confused lol.
    Yes but u couldve just done -2x-3/4=3/2 so a^3/2 but yh thats aroota.


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