bigmansouf
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Please can someone help me with this question. I have no clue on how to answer it.

Thank you in advance



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(Original post by bigmansouf)
Please can someone help me with this question. I have no clue on how to answer it.

Thank you in advance



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For a), first write out the expansion of (1+x)^n and then think about substitutions you could make for x.

Post any working/ideas you have if you're still stuck.
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bigmansouf
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Please look at my work this is what I have done but still confused on what to do next Name:  Scan0087.jpg
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davros
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(Original post by bigmansouf)
Please look at my work this is what I have done but still confused on what to do next Name:  Scan0087.jpg
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You're making life far too difficult for yourself!

What are the 2 simplest values for x you could choose?
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bigmansouf
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you could choose x=1 or x=2
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davros
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(Original post by bigmansouf)
you could choose x=1 or x=2
Choosing x = 1 would give you (1 + x)^n = 2^n which helps for the first part.

But choosing x = 2 gives (1 + x)^n = 3^n, which isn't what you want.

What other value of x might you try?
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bigmansouf
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choose x=1
i understand but im still confused about the expansion bit
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davros
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(Original post by bigmansouf)
choose x=1
i understand but im still confused about the expansion bit
Which one - the second one or both parts?

Presumably in class your teacher has gone through the expansion of (a + b)^n where n is a positive integer?
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bigmansouf
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(Original post by davros)
Which one - the second one or both parts?

Presumably in class your teacher has gone through the expansion of (a + b)^n where n is a positive integer?
Sorry i have been learning it myself the whole alevel due to unfortunate circumstances i have to learn by myself

I have purchase a dvd from http://s256376672.websitehome.co.uk/mathstutor.html
and m4ths.com


i have gone all the questions from the main edexcel c2 book but this question is the further extension question from Rosemary's Edexcel as Core Mathematics

http://www.amazon.co.uk/Core-Mathema...semary+edexcel

this is the only question i have yet to overcome 55-14ext-14.pdf
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davros
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, so
(Original post by bigmansouf)
Sorry i have been learning it myself the whole alevel due to unfortunate circumstances i have to learn by myself

I have purchase a dvd from http://s256376672.websitehome.co.uk/mathstutor.html
and m4ths.com


i have gone all the questions from the main edexcel c2 book but this question is the further extension question from Rosemary's Edexcel as Core Mathematics

http://www.amazon.co.uk/Core-Mathema...semary+edexcel
OK, so have you seen the formula for expanding (a + b)^n in terms of binomial coefficients?
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bigmansouf
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yh i have seen it and applied it to understand the subject but somehow I dont understand this question
I will revise this topic and revise the question
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