WJEC C2 January 2014 [17/1/14]

Original post by KillJoy

Did someone else end up with an algebraic fraction to solve in 6. b)?

No, I just integrated the curve equations and put In the limits for x?

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Reply 61

KillJoy

6

Original post by Emily-Beth

No, I just integrated the curve equations and put In the limits for x?

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Sorry I meant question 5

Reply 62

Original post by KillJoy

Sorry I meant question 5

Ohhh, personally no :/

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Reply 63

10 was a sort of iteration question from C3. It worked out to be 4, 0.75 and -1/3 repeated and then T50 was 0.75 I think! :smile:

haha. I totally messed up the 5aii) triangle question, but I think lots of people did

(edited 10 years ago)

Reply 64

Original post by swilliams14

10 was a sort of iteration question from C3. It worked out to be 4, 0.75 and -1/3 repeated and then T50 was 0.75 I think! :smile:

haha. I totally messed up the 5aii) triangle question, but I think lots of people did

I had this too! But I was sure it was wrong as t1=4 and t4 =4? :s

Reply 65

Original post by sunflower95

wasnt the question show that they dont intersect? if the dont intersect there will be no real roots.. so bsquared -4ac < O which it was.. so youve proves that they dont intersect? anyonw get that??
p.s so how are you wrong sorry?

Yeah I used b2-4ac<0 from C2 and my teacher said that was correct! phewww :smile:

Reply 66

Original post by Jossc1

I had this too! But I was sure it was wrong as t1=4 and t4 =4? :s

yeah I thought that but when you carry on working it out it went t4=4, t5=0.75, t6, -1/3 and it kept repeating so that was the sequence.. I just kept going until t50 to get it then haha

Reply 67

Original post by swilliams14

yeah I thought that but when you carry on working it out it went t4=4, t5=0.75, t6, -1/3 and it kept repeating so that was the sequence.. I just kept going until t50 to get it then haha

Ah that's good to know! What did you get for the radian question?

Reply 68

Original post by Jossc1

Ah that's good to know! What did you get for the radian question?

I got the angle to be 1.4 radians and then the perimeter was both arc lengths + 3 + 3 to give 21.4 cm? Did you get that? :smile:

Reply 69

Original post by swilliams14

I got the angle to be 1.4 radians and then the perimeter was both arc lengths + 3 + 3 to give 21.4 cm? Did you get that? :smile:

Yes and me!! This is is reassuring to hear haha, I was panicking because I know I've dropped quite a few marks on 2b and 5aii. Thanks for replying!

Reply 70

Original post by Jossc1

Yes and me!! This is is reassuring to hear haha, I was panicking because I know I've dropped quite a few marks on 2b and 5aii. Thanks for replying!

Same! I dropped those aswell. I even messed up the simple trig equations and missed of the area of a Triangle question! I'm a silly silly girl haha! I'm just praying for an A so hope everything else was right. No problem. C3 Wednesday now. Good look if you're doing it :smile:

Reply 71

Original post by swilliams14

Same! I dropped those aswell. I even messed up the simple trig equations and missed of the area of a Triangle question! I'm a silly silly girl haha! I'm just praying for an A so hope everything else was right. No problem. C3 Wednesday now. Good look if you're doing it :smile:

Im sure you'll do fine! I did the area of the triangle wrong somehow too! And the question before it I ended up with a quadratic equation but it didn't factorise and I couldn't find my mistake so I've lost marks there! Yes I will be, good luck to you too!

Reply 72

Original post by Jossc1

Im sure you'll do fine! I did the area of the triangle wrong somehow too! And the question before it I ended up with a quadratic equation but it didn't factorise and I couldn't find my mistake so I've lost marks there! Yes I will be, good luck to you too!

I literally haven't come across anybody that has been able to solve that quadratic equation for 5aii, so don't beat yourself up about it. I hope the grade boundaries are low, because it was a tricky paper :smile:

Reply 73

sunflower95

anyone remember what the got for the value of n in the arithmetic progression? I had -7 :s-smilie:

Reply 74

cengland

Did anyone get for 4(b)(i):
a = -2916
r = -1/3

Reply 75

Original post by sunflower95

anyone remember what the got for the value of n in the arithmetic progression? I had -7 :s-smilie:

I had -10 :/

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Reply 76

Original post by cengland

Did anyone get for 4(b)(i):
a = -2916
r = -1/3

I had r, not the value for a

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(edited 10 years ago)

Reply 77

Original post by sunflower95

anyone remember what the got for the value of n in the arithmetic progression? I had -7 :s-smilie:

I had 8, not sure if its right? :s

Reply 78

sunflower95

Original post by Emily-Beth

I had -10 :/

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I think I did this..
a+(2n-1)d=3(a+(n-1)d
then after rearranging it I put the values of a and d in.. It confused me for a while aha genuinely had no idea

Reply 79