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# WJEC C1 13th May 2013 Watch

1. (Original post by _Morsey_)
If you're referring to the discriminant question, for the first part, since there were two equal roots, technically that means there must been one root (two the same), so i just did b^2 - 4ac = 0 which then proved the equation they wanted.

For the second part, when they asked to disprove that there were two equal roots, i took the new equation and applied b^2 - 4ac to it again to get a negative answer. And since it was less than 0, it means there are no real roots.

Damm I didnt know you could do the B^2 -4ac twice!!! I hope I get 1 mark for it!
2. [ATTACH=CONFIG]215918 hey can someone help me with this? Jan 2013 C2
Attached Images

3. [ATTACH=CONFIG]215918 hey can someone help me with this? Jan 2013 C2 q.4
4. (Original post by emzlynn)
[ATTACH=CONFIG]215918 hey can someone help me with this? Jan 2013 C2
a + (n-1)d.
Sub in a=1 and d=4

1+ (n-1) 4

If you expan it

4n-4+1.

Which comes out as 4n-3

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5. (Original post by emzlynn)
[ATTACH=CONFIG]215918 hey can someone help me with this? Jan 2013 C2
I think for part b you write it back wards and then add them both. Like you do to find the proof of the nth term.

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6. (Original post by fil.sissay)
I think for part b you write it back wards and then add them both. Like you do to find the proof of the nth term.

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I meant for part a (ii)

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7. (Original post by emzlynn)
[ATTACH=CONFIG]215918 hey can someone help me with this? Jan 2013 C2 q.4
Did u get a?

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8. My maths teacher did the worked solutions for this paper shout if you need any other answers!

Managed to get half of Q10 for the c1 paper this year, but kicking myself about the 2nd part of binomial expansion bit ahh well, roll on c2...

Is anyone else doing s1 instead of m1?
Attached Images
9. Jan 13 worked solutions.pdf (730.4 KB, 144 views)
10. (Original post by Isobelle)
My maths teacher did the worked solutions for this paper shout if you need any other answers!

Managed to get half of Q10 for the c1 paper this year, but kicking myself about the 2nd part of binomial expansion bit ahh well, roll on c2...

Is anyone else doing s1 instead of m1?
Am doing s1.

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11. How early did u guys start independent revision for all your exams?

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12. (Original post by Isobelle)
My maths teacher did the worked solutions for this paper shout if you need any other answers!
Thanks! Does anyone have a copy of the question paper (C2 - Jan 13) or just a list of the questions on the paper?
13. Guys, what is this topic called question 2 on the c2 paper.

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14. (Original post by Visvim)
Thanks! Does anyone have a copy of the question paper (C2 - Jan 13) or just a list of the questions on the paper?

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15. (Original post by Visvim)
Thanks! Does anyone have a copy of the question paper (C2 - Jan 13) or just a list of the questions on the paper?

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16. (Original post by Visvim)
Thanks! Does anyone have a copy of the question paper (C2 - Jan 13) or just a list of the questions on the paper?

There u go.

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17. (Original post by fil.sissay)
I think for part b you write it back wards and then add them both. Like you do to find the proof of the nth term.

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Thankyou so much!!! Il have a look at it later and let you know
18. (Original post by Isobelle)
My maths teacher did the worked solutions for this paper shout if you need any other answers!

Managed to get half of Q10 for the c1 paper this year, but kicking myself about the 2nd part of binomial expansion bit ahh well, roll on c2...

Is anyone else doing s1 instead of m1?
Me
19. (Original post by fil.sissay)

There u go.

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Thank you so much! I've been looking everywhere for it.
Thanks!
20. Does anyone have the solutions for c1?
21. does anyone have the solutions for c1 may 2013?

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