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# C3 functions?

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Why bother with a post grad course - waste of time? 17-10-2016
1. http://www.examsolutions.net/a-level...y/paper.php#Q5
part d is quite a struggle so here's what i've done so far

i did

set that equal to

which gives

i got rid of 2x from both sides then the x^2

which left me with

i then did ln of each side which gets me

i then split it up into 4 separate bits

and that's as far as i've gotten, not sure what to do from here on.

2. Spoiler:
Show
If

Then

3. (Original post by edothero)

Spoiler:
Show
If

Then

4. (Original post by edothero)
Spoiler:
Show
If

Then

right so it would be then?

so i managed to get 6 or 0 as an answer is that it?
5. (Original post by thegreatwhale)
right so it would be then?

so i managed to get 6 or 0 as an answer is that it?
Sounds good
6. (Original post by edothero)
Sounds good
and that's it nothing else?
7. (Original post by thegreatwhale)
and that's it nothing else?
Yup
x = 0, 6 is correct.
8. (Original post by edothero)
Yup
x = 0, 6 is correct.
thanks

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