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Equation help

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  • 08-06-2015 3:59pm
    #1
    REFLINE1
    Registered Users Posts: 382 ✭✭


    Hi,
    I'm looking at a solution of an equation, can someone explain how the 0.54 index has been arrived at.(Some sort of log reduction?)
    Thanks- apologies if this is very basic but my maths is very rusty.

    5j3fwnycn

    20150608_155050.jpg


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    #2
    Moody_mona
    Registered Users Posts: 1,107 ✭✭✭Moody_mona


    To isolate the Q, you can think of finding a root (in this case the 1.85th root) of both sides. That's a bit messy be cause of the decimal, so you can equally put each side to the power of 1/1.85 (index rules state that the nth root of an expression is equal to the expression to the power of 1 over n).

    1/1.85 = 0.54 so the right hand side is essentially raised to that power.


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    #3
    REFLINE1
    Registered Users Posts: 382 ✭✭REFLINE1


    Moody_mona wrote: »
    To isolate the Q, you can think of finding a root (in this case the 1.85th root) of both sides. That's a bit messy be cause of the decimal, so you can equally put each side to the power of 1/1.85 (index rules state that the nth root of an expression is equal to the expression to the power of 1 over n).

    1/1.85 = 0.54 so the right hand side is essentially raised to that power.

    Thanks a lot for that, great stuff.


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