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# WJEC C1 13th May 2013 watch

1. (Original post by fil.sissay)
How early did u guys start independent revision for all your exams?

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I wrote up notes a month or so ago, then apart from hw i've only seriously started doing past papers in the last couple of weeks...

Yay s1 friends m1 looks way too scary already - there's a reason i didn't take physics
2. (Original post by Isobelle)
I wrote up notes a month or so ago, then apart from hw i've only seriously started doing past papers in the last couple of weeks...

Yay s1 friends m1 looks way too scary already - there's a reason i didn't take physics
I don't think m1 will be way harder than s1. And yh I heard there's some physics math in m1.

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3. What is the pth term of the geometric series C2? Jan 2013 q.5.

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4. (P+4) is 81

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5. (Original post by Shuhanis)
(P+4) is 81

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I don't really get how you work it out. :/

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6. By dividing the p+2 term with pth term

You should get r

Then use that to get the p+3 and p+4
term..
If u get me?:L

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7. (Original post by Shuhanis)
By dividing the p+2 term with pth term

You should get r

Then use that to get the p+3 and p+4
term..
If u get me?:L

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I though the pth term of GP is ar^p-1

Say if p is 4th.

The answer should be ar^4-1 which is ar^3. And the 4th term is ar^3 in the GP.

So how come you have the pth term to be ar^p.
:/

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8. Ill look at te question properly and get back to you

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9. (Original post by Shuhanis)
Ill look at te question properly and get back to you

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Ok. .

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10. (Original post by fil.sissay)
I don't really get how you work it out. :/

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Type in the date of the paper and wjec into youtube....It explains there
11. (Original post by emzlynn)
Type in the date of the paper and wjec into youtube....It explains there
Ok thanks

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12. (Original post by emzlynn)
Type in the date of the paper and wjec into youtube....It explains there
I only got results for jan 12 and June 12 only. I can't find the jan 13.

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13. How/where did u get the results for jan&may12?

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14. (Original post by Shuhanis)
How/where did u get the results for jan&may12?

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From YouTube. But I can't find the pth term one for jan 13.

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15. In 24hrs ... Well be doing the may14 paper :O
The time has come too soon

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16. May13**

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17. (Original post by fil.sissay)
From YouTube. But I can't find the pth term one for jan 13.

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What did you type in?
18. (Original post by emzlynn)
What did you type in?
I typed 'c2 Gce wjec solutions jan 2013. '

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19. (Original post by fil.sissay)
I typed 'c2 Gce wjec solutions jan 2013. '

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Sorry you are right! I Have the answer tho!!
You know that pth term and the p+1 term are next to eachother.
E.g. if p was the 2nd term then p + 1 would be the third term. Also that its a GP and
Therefore to find r you devide the terms which are next to eachother.
Then all you have to do is find r which = p+1/p = 24/16 = 1.5.
We know that the p+1 term is 24, therefor the next term (ie p+2) = 24 x1.5= 36,
then p+ 3 = 36 x 1.5 = 54 thus p+4 term = 54 x 1.5 = 81
I hope that helps!!!! Do you know what to do for 8bi) proving its a tengent.....I can find Q but I can't prove its a tangent!
20. (Original post by emzlynn)
Sorry you are right! I Have the answer tho!!
You know that pth term and the p+1 term are next to eachother.
E.g. if p was the 2nd term then p + 1 would be the third term. Also that its a GP and
Therefore to find r you devide the terms which are next to eachother.
Then all you have to do is find r which = p+1/p = 24/16 = 1.5.
We know that the p+1 term is 24, therefor the next term (ie p+2) = 24 x1.5= 36,
then p+ 3 = 36 x 1.5 = 54 thus p+4 term = 54 x 1.5 = 81
I hope that helps!!!! Do you know what to do for 8bi) proving its a tengent.....I can find Q but I can't prove its a tangent!
That explains well thank u very much. I misunderstood the question.
And for 8 b the line is y=2x+1
And u got the equation of the circle y=.....

What you do is you let y=2x+1 and you sub that into the eqn of circle

So y is replaced as 2x+1

X^2 + (2x+1)^2 +6x-10(2x+1)+14

Expand

5x^2 -10x +5 (divide by 5)

X^2 -2 +1

Factories

(X-1)(x-1)

X=1 there's only one point of intersection therefore tangent. Hope it helped. ill explain further if u don't get it.

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