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vanibharutham:
paper 1 or 2?

shan2391:

--- Quote from: vanibharutham on June 04, 2009, 05:01:27 pm ---paper 1 or 2?

--- End quote ---
oops P2

vanibharutham:
{ = integration symbol, because i cant put the damn symbol on here :P

i)  Differentiate x ln x with respect to x
ii) Hence find {ln x dx.

First bit is easy
y = x lnx
Dy/dx = (1)(ln x) + (x)(1)
                                x
=> ln x + 1

The second part is asking you to use your first answer to help you find your integral of {ln x dx

ok

Well

we know that

{ln x + 1 dx = x lnx

therefore {ln x dx => x lnx - {1 dx

=> x lnx - x + c

To check if you answer is correct simply differentiate it

Y = x lnx - x + c
dY/dx = (1)(ln x) + (x)(1/x) - 1
         = ln x + 1 - 1
         => ln x

Hence we are correct

sweetsh:
It seems im the only girl here taking this subject.
So guys I lost the prediction topics, what were the predictions?

vanibharutham:

--- Quote from: ineedaz on June 03, 2009, 08:30:28 pm ---yea i got 1330 aswell... thnk the vector was 30 something i and 40 somethng j
SIMPLEST paper ive done so far... hope paper 2 stays that way...
PREDICTIONS FOR PAPER 2 anyone??
- permutations and combinations
- matrices
- sets
- functions
- more calculus (DUHH!!) perhaps approximate change, more area, probably another kinematics question(which will not be optional),
- simple vectors
- trigonometry equations
- graph sketching
- inequalities
- binomial expansions
don't forget to study what came in paper 1 cause they may bring it again!!! for instance, i think they might bring circular measure again cause the one in paper 1 was tooooo easy!!

--- End quote ---

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