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Old October 28th, 2009, 08:29 AM
Ola Ola is offline
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Hi lads I am new to the world of maths, please i needed help urgently on these questions as I have got no clue as to what is going on there. any help will gretly apprecaited.
Thanks
Ola
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Old October 28th, 2009, 02:30 PM
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Originally Posted by Ola View Post
Hi lads I am new to the world of maths, please i needed help urgently on these questions as I have got no clue as to what is going on there. any help will gretly apprecaited.
Thanks
Ola
to a)

Re-write the RHS:

5^{3x+1} = \dfrac{5^3 \cdot 125^4}{\sqrt{625}}=\dfrac{5^3 \cdot (5^3)^4}{(5^4)^{\frac12}} = 5^{3+12-2}

Two powers with the same base are equal if the exponents are equal too.

Solve for x.
Spoiler:
I've got x = 4
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Old October 28th, 2009, 10:59 PM
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Please don't post more than three questions in a thread. Otherwise the thread can get convoluted and difficult to follow. Start new threads as necessary for remaining questions. eg. If you have five questions, post three of them in one thread and start a new thread for the remaining two etc.

And if the question has more than two parts to it, it is best to post only that question and its parts in the thread and start a new thread for other questions.

And please type them rather than attaching them as a word file.

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