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    • Thread Starter

    Hi all,

    First of all I would like to say that I am currently studying HNC Civil Engineering part time around my apprenticeship. As part of this course I have to study A Level maths, however there are no exams only written assignments !.

    Maths isnt my strength, I struggle greatly, however I have tried my best and so far I am doing ok. It is just this last question which I am struggling with, I have already recieved written feedback on my attempt and I have been told there is a mistake somewhere. I hope that the tutor is just mistaken by one of the powers I have written down, but as I cannot speak to my tutor before I hand it in (and it is the final submission), I would just like to get it verified by someone on here.

    The question is below.

    Evaluate the following using indices without the use of a calculator

    (2r²)⁵ × (3r⁴) ³/

    Oh and I dont expect anyone to actually 'do' the question for me (unless this is permitted by the forum), but for someone to come up with an answer which we could discuss would be greatly appreciated.

    Thank you for your time.....
    • Thread Starter

    This is the question as it didnt turn out very good.


    For an indices question:

     ar^b . cr^d = (ac) r^{b+d}

    eg.  2r^4 . 17r^7 = 34r^{11}


     (kr^a)^b = k^br^{ab}

     \frac {pr^a}{qr^b} = \frac{p}{q}r^{a-b}

    It will help you greatly to evaluate the numerator first before looking at the denominator.
    • Thread Starter

    hey thanks!,

    i got 6r to the power of 19.

    You have the right power of r, however the number in front of it should be

     \frac{2^5.3^3}{6} = 144
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