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C4 binomial expansion help Watch

1. I'm trying to do question 3b on this paper and have looked at the mark scheme but I can't understand what is supposed to happen to the 256 in the question as the answer seems to ignore it.
http://www.mathsgeeks.co.uk/allpaper...AQAJan10QP.pdf
here is the mark scheme
http://www.mathsgeeks.co.uk/allpaper...AQAJan10MS.pdf
i have found part a fine
i would appreciate it if anyone could help me get a better understanding of this, thanks
2. (Original post by sw95)
I'm trying to do question 3b on this paper and have looked at the mark scheme but I can't understand what is supposed to happen to the 256 in the question as the answer seems to ignore it.
http://www.mathsgeeks.co.uk/allpaper...AQAJan10QP.pdf
here is the mark scheme
http://www.mathsgeeks.co.uk/allpaper...AQAJan10MS.pdf
i have found part a fine
i would appreciate it if anyone could help me get a better understanding of this, thanks
Part b follows on from part a, in terms of content. So, we want to get our expression into a form similar to that of

If we divide the top and bottom of our fraction under the cube root, we have:

Giving us the "4" in front of the brackets in the MS.
3. (Original post by sw95)
I'm trying to do question 3b on this paper and have looked at the mark scheme but I can't understand what is supposed to happen to the 256 in the question as the answer seems to ignore it.
http://www.mathsgeeks.co.uk/allpaper...AQAJan10QP.pdf
here is the mark scheme
http://www.mathsgeeks.co.uk/allpaper...AQAJan10MS.pdf
i have found part a fine
i would appreciate it if anyone could help me get a better understanding of this, thanks
When I was doing A level maths I used this website all the time:
http://www.examsolutions.net/
It is sooo good, really good videos explaining how to figure out all of the answers etc. it has past papers on there too.
I managed to get an A in C4! All thanks to that website

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4. (Original post by ghostwalker)
Part b follows on from part a, in terms of content. So, we want to get our expression into a form similar to that of

If we divide the top and bottom of our fraction under the cube root, we have:

Giving us the "4" in front of the brackets in the MS.
thanks

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