Qualification > Math

Additional Math Help HERE ONLY...!

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sweetsh:
It is not published, too early, when iit's published  it appears on CIE's website.

Anonymous:
hey, does anyone have the Oct/Nov 08 Examiner's report?

Ghost Of Highbury:
but the cie website says..it has been uploaded in the cie direct which requires login

i got hold of the provisional one..but no final??

lil^$tar:

--- Quote from: ramezamgad on May 30, 2009, 01:21:36 am ---it simply means the velocity of 1 particle relative to another 1
there are only 2 probabilities
both are moving in the same direction so their velocities are subtracted
they are moving towards each other so their velocities are added

waiting for ur reply lil^$tar

--- End quote ---
ok thanx can u giv me a question on it so dat i cud see how gud i understand it

vanibharutham:
Hi,

i was doing the following question:

The function f(x) = [ (ex + 1) / 4 ] for the domain x ? 0

i) Obtain an expression for f-1
ii) State the domain and range for f-1

The first part was easy...
i got the answer, and when i checked it with the mark scheme i got the right answer, which was:
ln(4x-1)

The second part of my answer didn't match the mark scheme, and i dont seem to understand the why.

The domain, according to me should be:

x > 1/4

The range should be:

f-1(x) > -3.2188

However, the mark scheme says that the answers are:

DOMAIN: x > 1/2
RANGE: f-1(x) > 0

could some one please explain my mistake?

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