Qualification > Math

Maths paper31 was easy

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AndrewCedric:

--- Quote from: ilmarien on May 30, 2010, 08:01:55 am ---Everyone! How was paper 32? It was quite good for me. I couldn't do one sub-number, fortunately, it scored only for 1 mark. (It's the question that asks what happens to x if t was very-very large.)
I think the questions were quite simple, but the procedures were longer than usual.
How about all of you who took it?



--- End quote ---

Yes that was the only question that intrigue me. The rest, i'm sure of it.
But I think It also increases up to a point where it is bigger than 1 and becomes undefined.

falafail:

--- Quote from: AndrewCedric on May 31, 2010, 02:32:24 am ---Yes that was the only question that intrigue me. The rest, i'm sure of it.
But I think It also increases up to a point where it is bigger than 1 and becomes undefined.

--- End quote ---

how did you guys get the differential equation for that question? it was so confusing i just skipped it :(

AndrewCedric:
The intergrate ones?? ahahahahhaa
You have to inverse both sides or you wont get the answer
1/ sinxcosx= e^(-2t)/-2

If you inverse becomes
sinxcosx=-2e^(-2t)

Then you can solve

falafail:

--- Quote from: AndrewCedric on May 31, 2010, 12:36:51 pm ---The intergrate ones?? ahahahahhaa
You have to inverse both sides or you wont get the answer
1/ sinxcosx= e^(-2t)/-2

If you inverse becomes
sinxcosx=-2e^(-2t)

Then you can solve


--- End quote ---

oh.. i didn't inverse anything :[
so what's the final answer?

AndrewCedric:
Cant remember.lol. But the answer was pretty exact. No long decimals thing.

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