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# C1 Indices Homework watch

1. Given that x=3^k and y=2^k express the following in the terms of x and y.

a) 2^(k+1)

I understand how to do this is it was the powers to x and y and you had to simplify it (making the bases the same etc) but I'm confused with this method.

I have the answer, so will know when the method is right,

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2. this seems v.difficult for C1

if you can use just one of x and y then it is not difficult... the question suggests you should use both ?
3. Well it's a question

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4. Err.. what? The answer to the exact question you asked is just (and is only GCSE level).. you're complaining about something the question isn't asking for
5. is it not 2*y?
6. Yeah that's the answer, but I don't understand why? Or how it works??

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7. (Original post by LuckyEms)
Yeah that's the answer, but I don't understand why? Or how it works??

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pq+r = pq*pr
8. Okay so we know when you have the same base numbers and you multiply you just add the indices together
therfore k must be an indice with base two and so must one, we can split it into

2^k * 2^1

2^k = y and 2^1 = 2

2*y
9. Oohhhhhh ok brilliant, thank you for you help!!

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Updated: October 11, 2013
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