[otrivine]

this is the paper http://www.edexcel.com/migrationdocu...e_20080606.pdf

i am stuck on questions 2)c)ii) , 3)c) and d) , 4)b) and c) only on how to find the domain . can someone help me on these questions please!!! i would appreciate

[TenOfThem]

2cii you know the smallest value cos can take hence your answer

3c for Q and R just put x=0 and y=0

3d just put the 2 versions of f(x) equal to each other

4b when x = 3 you have a fraction, as x gets bigger the fraction gets smaller

4c the domain of the inverse i the range of the original

[otrivine]

(Original post by TenOfThem)
2cii you know the smallest value cos can take hence your answer

3c for Q and R just put x=0 and y=0

3d just put the 2 versions of f(x) equal to each other

4b when x = 3 you have a fraction, as x gets bigger the fraction gets smaller

4c the domain of the inverse i the range of the original

for 2)c)ii the smallest vaslue is 67.4 i think 1.56 something radians but then what do we do
3)c) yes R and Q are easy dont know P??

[otrivine]

(Original post by TenOfThem)
2cii you know the smallest value cos can take hence your answer

3c for Q and R just put x=0 and y=0

3d just put the 2 versions of f(x) equal to each other

4b when x = 3 you have a fraction, as x gets bigger the fraction gets smaller

4c the domain of the inverse i the range of the original

is domain of inverse always be the same as range?

[mazboy008]

Have a look at the following website.
I gives you videos for solutions of every Maths module for edexcel.
http://www.examsolutions.co.uk/a-lev...June/paper.php

[TenOfThem]

(Original post by otrivine)
is domain of inverse always be the same as range?

Yes, when you inverse the Domain and the Range swop over

[TenOfThem]

(Original post by otrivine)

3)c) yes R and Q are easy dont know P??

P is the easiest bit ... you should know when a modulus graph turns

[TenOfThem]

(Original post by otrivine)
for 2)c)ii the smallest vaslue is 67.4 i think 1.56 something radians but then what do we do

Cos of what angle gives the smallest value ... what x would give that angle

[otrivine]

(Original post by TenOfThem)
Cos of what angle gives the smallest value ... what x would give that angle

thank u tenofthem it really helped +reps

[otrivine]

(Original post by mazboy008)
Have a look at the following website.
I gives you videos for solutions of every Maths module for edexcel.
http://www.examsolutions.co.uk/a-lev...June/paper.php

thanks mate