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# Can this c2 beast be tamed?? watch

1. Part (b)'s the troublemaker here, any guidance would be appreciated.
(Just to get me started, please!)
2. Do you know what 'independent of x' means? It means x^0.

What combination of x and 1/(x^2) give x^0?

Next, don't expand it out, use the general term of the binomial expansion to find that value.
3. (Original post by Terminatoring)

Part (b)'s the troublemaker here, any guidance would be appreciated.
(Just to get me started, please!)
We use the nCR method- it is straightforward and organised

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4. (Original post by CancerousProblem;[url="tel:55838283")
55838283[/url]]Do you know what 'independent of x' means? It means x^0.

What combination of x and 1/(x^2) give x^0?

Next, don't expand it out, use the general term of the binomial expansion to find that value.
Would 10 & 5 work? That's what came to my head, so I presume it's just a matter of thinking about it?

In terms of getting the term alone, I was taught the method with 2! 3! Etc on the denominator so I'm not sure if it's easy thiswayway
5. (Original post by Terminatoring;[url="tel:55838533")
55838533[/url]]Would 10 & 5 work? That's what came to my head, so I presume it's just a matter of thinking about it?

In terms of getting the term alone, I was taught the method with 2! 3! Etc on the denominator so I'm not sure if it's easy thiswayway

Actually I've just realised it isn't that hard to use. I got 96096 - gonna check the answer now, thanks !!'
6. Could I just clarify which exam board this is for? Stressing that I wouldn't have a clue what to do with that question!!

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7. (Original post by hannahemily_xx;[url="tel:55838845")
55838845[/url]]Could I just clarify which exam board this is for? Stressing that I wouldn't have a clue what to do with that question!!

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It's edexcel, but it's a Solomon paper which are traditionally harder. Do you want me to explain it to you? I think it may depend on how you do the binomial expansion
8. (Original post by Terminatoring)
It's edexcel, but it's a Solomon paper which are traditionally harder. Do you want me to explain it to you? I think it may depend on how you do the binomial expansion
Oh gosh, same as me! Makes me feel a little bit better about that paper but that would be really kind of you if you wouldn't mind?

9. Sorry it's upside down! Is this correct for a? Still wouldn't know how to do b though if you wouldn't mind helping please? Thanks
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10. I got K=2 and A=420 for a) is that right? and how do you do b)?
11. (Original post by hannahemily_xx;[url="tel:55839475")
55839475[/url]]Oh gosh, same as me! Makes me feel a little bit better about that paper but that would be really kind of you if you wouldn't mind?
No problem. Basically to get a term independent of x means to say there is no x term and thus you need to find a way to eliminate x. You must do this by finding the term where where the x^n is multiplied by the (k/x^2)^n the power of x is identical, so you divide by the same thing.

Hopefully this should explain if you need it
12. (Original post by Terminatoring)
No problem. Basically to get a term independent of x means to say there is no x term and thus you need to find a way to eliminate x. You must do this by finding the term where where the x^n is multiplied by the (k/x^2)^n the power of x is identical, so you divide by the same thing.

Hopefully this should explain if you need it
Thank you so much, I understand now! Super helpful
13. (Original post by logicmaryam)
I got that too!
Well fingers crossed there's safety in numbers do you know which year it's from, I can check the mark scheme?
14. (Original post by hannahemily_xx;[url="tel:55840173")
55840173[/url]]Thank you so much, I understand now! Super helpful
15. (Original post by hannahemily_xx)
Well fingers crossed there's safety in numbers do you know which year it's from, I can check the mark scheme?
still don't know how to do b)... no sorry, just saw it here and gave it a try

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