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Additional Math Help HERE ONLY...!

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vanibharutham:
You are a genius! :D

thanks for that :P

remind me thank you over nd over agen :P

lil^$tar:

--- Quote from: ramezamgad on May 30, 2009, 08:21:02 pm ---lil^$tar

what is the relative velocity of two particles A and B moving

a) towards each other A with velocity 10 and B with velocity 15????
b) in the same direction A with velocity 10 and B with velocity 15????
c) in the same direction A with velocity 15 and B with velocity 15????

vanibharutham
what is the domain of the first eq.?

--- End quote ---
a)25 b)-5 c)0

ramezamgad:
b is not -ve
u just need to know that B will move faster than A and the distance between them will decrease until they become side to side then the distance between them will increase
hope u find that easy

lil^$tar:
thanks very much +rep 4 u

Ghost Of Highbury:

--- Quote from: vanibharutham on May 30, 2009, 07:57:41 pm ---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?

--- End quote ---

which paper did this question appear in..
year/month/paper..

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