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# Indice Question watch

1. I can simplify it, but cannot find the answer - r = 3, k = 2/3!!!
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2. (Original post by Gmart)
I can simplify it, but cannot find the answer - r = 3, k = 2/3!!!
Post some working then. If you can't LaTex it, take great care with the brackets, so it's clear what you mean.

It does work out to the given answer.
3. I can't get Latex to work on Ubuntu, despite much time trying

I can get the working down to something like:

I can put the powers together a bit more, but cannot get a simple fraction which might do it.
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4. (Original post by Gmart)
I can't get Latex to work on Ubuntu, despite much time trying

I can get the working down to something like:

I can put the powers together a bit more, but cannot get a simple fraction which might do it.
collect the powers of x into the denominator, the another powers into the numerator

So you can read down the exponent of x which is equal 3
5. Oh!, yes, of course!, thank you so much

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