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# C3 Maths help needed - functions :( watch

1. Not sure how I go about with 2b

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2. You were on the right track with . Solve this for x by first dividing both sides by 2. Ignore the restrictions for now, if they're just confusing you, it will be clear once you isolate .
3. (Original post by Mystelle)
Not sure how I go about with 2b
You started off fine. Find the x-coordinate where the gradient is 8, and rearrange into their wanted form.
4. Hmm. I think you need to look over the first question again first.
5. (Original post by etothepiiplusone)
Hmm. I think you need to look over the first question again first.
Looks like they've just drawn their axes strangely, they've labelled the asymptote correctly.
6. (Original post by RDKGames)
You started off fine. Find the x-coordinate where the gradient is 8, and rearrange into their wanted form.

Is that how you do it? I’m not sure if, when dividing by 4, you divide the whole expression by 4 so including the ln or just the (8-6) like I have done
7. (Original post by Mystelle)

Is that how you do it? I’m not sure if, when dividing by 4, you divide the whole expression by 4 so including the ln or just the (8-6) like I have done
It's , not
8. (Original post by RDKGames)
It's , not

Is it correct now?

*sorry for the sideways photos, no idea how it turned like that
9. (Original post by Mystelle)

Is it correct now?

*sorry for the sideways photos, no idea how it turned like that
Okay, hold on, back up - didn't notice it at first glance but you should have started with so hence

Also
10. (Original post by RDKGames)
Okay, hold on, back up - didn't notice it at first glance but you should have started with so hence

Also
It says that the answer is a = 2, b = -1.5
but considering what you just said, that , I don't understand how they got their answer
11. (Original post by Mystelle)
It says that the answer is a = 2, b = -1.5
but considering what you just said, that , I don't understand how they got their answer
Carry on working from where I left off for you. Use the rule
12. (Original post by RDKGames)
Carry on working from where I left off for you. Use the rule
Cheers, got there in the end

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