CCEA C4 Mathematics - 22nd May 2014

for the vector equation one, did you have to equate the vector they gave you with the vector equation and get two values of lambda the same then substitute the value of lambda=2 back into the vector equation to show it equalled the vector they gave you?

for the substitution one did we get pi7 point something??

what did you get for the last one? (2pi,-4) and i forget the other one..

cheers guys

Reply 6

for the differential equation one, for the time the ice melted did we get 19:27 ?? or 7:27 pm

Reply 7

Original post by Mr Tall

for the vector equation one, did you have to equate the vector they gave you with the vector equation and get two values of lambda the same then substitute the value of lambda=2 back into the vector equation to show it equalled the vector they gave you?

for the substitution one did we get pi7 point something??

what did you get for the last one? (2pi,-4) and i forget the other one..

cheers guys

Yeah all answers are the same! Though for the last question, I think there was only one point, as it said point in the question, I got the point you got, and a second point, but I'm sure it's wrong :frown:

hopefully shouldn't lose too many marks though :biggrin:

Reply 8

Original post by stephen_mcgarry

Yeah all answers are the same! Though for the last question, I think there was only one point, as it said point in the question, I got the point you got, and a second point, but I'm sure it's wrong :frown:

hopefully shouldn't lose too many marks though :biggrin:

it was "points" im 100% sure it was

Reply 9

Original post by Mr Tall

it was "points" im 100% sure i was

Sorry buddy

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Reply 10

Original post by stephen_mcgarry

Sorry buddy

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**** i thought by "coordinates" it meant two

Reply 11

Original post by Mr Tall

**** i thought by "coordinates" it meant two

I know ugh I did that as well! No worries though, only lose one or two for that I'm sure :smile:

Reply 12

Original post by stephen_mcgarry

I know ugh I did that as well! No worries though, only lose one or two for that I'm sure :smile:

but what if there was 2 points with gradient root2 in that domain? did you just have to pick one?

Reply 13

Original post by stephen_mcgarry

I know ugh I did that as well! No worries though, only lose one or two for that I'm sure :smile:

whatd you do for the last part of the vetor equation one?

Reply 14

TheWiseSalmon

8

Original post by Mr Tall

what did you get for the last one? (2pi,-4) and i forget the other one..

I and 3 of my friends all got ((5π-2)/2, -2root2) for the last question so I'm hoping we're right.
Anyway, I think I did pretty well in that. Fingers crossed that C4 paper saves my A* after the disastrous C3 paper.

(edited 9 years ago)

Reply 15

Original post by TheWiseSalmon

I and 3 of my friends all got ((5π-2)/2, -2root2) for the last question so I'm hoping we're right.

i got that for one of the points

Reply 16

Original post by TheWiseSalmon

I and 3 of my friends all got ((5π-2)/2, -2root2) for the last question so I'm hoping we're right.
Anyway, I think I did pretty well in that. Fingers crossed that C4 paper saves my A* after the disastrous C3 paper.

Hi! I sure that's right for the point, but wasn't t out of the range to get these coordinates?

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Reply 17

TheWiseSalmon

8

Original post by Mr Tall

i got that for one of the points

I actually wrote 10π-4/4 and didn't realise that it could be simplified by dividing by 2. Will I lose a mark for that?

Reply 18