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Homework Help: General Maths question...

  1. Aug 9, 2016 #1
    please can someone very kindly verify this is correct?
  2. jcsd
  3. Aug 9, 2016 #2


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    Staff: Mentor

    I moved the thread to our homework section.

    Did you plug the result into the original equation to check? You can also use tools like http://www.wolframalpha.com for that.

    You use "x" for two different things, that notation is very confusing.
  4. Aug 9, 2016 #3
    Hi MFB.

    Yes I plugged it and it came out ok! Just wanted it checking as my logarithm work is self taught of youtube vids so not confident! :-)

  5. Aug 9, 2016 #4


    Staff: Mentor

    @Andy86, the problem statement is unclear. What you wrote appears to be ##3\cdot4## and ##8\cdot5##. If you meant 3.4 and 8.5, the decimal point needs to be lower so that it won't be confused with the raised dot (##\cdot##) that denotes multiplication.
  6. Aug 9, 2016 #5

    Ray Vickson

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    To get around the problem described in post #4, you should type out the problem (and preferably, the solution also).

    For example, if you mean that ##3.4^{2x+3} = 8.5## you would type that as 3.4^(2x+3) =8.5. But, if you mean that ##3 \times 4^{2x+3} = 8 \times 5## you would type that as 3*4^(2x+3) = 8*5. Finally, if you mean that ##(3 \times 4)^{2x+3} = 8 \times 5## you could type that as (3*4)^(2x+3) = 8*5. Generally, posted images of problems and solutions are discouraged, for a number of very good reasons.
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