You are Here: Home >< Maths

# C3 soloman. Rate of change.

Announcements Posted on
Why bother with a post grad course - waste of time? 17-10-2016
1. Hey. Please can somone help me with this question.
https://b3755649dbd1afe3db91a899c3b9...20C3%20OCR.pdf
Im confused how to got about question 9(iii) how do i use the fact that it is a translation to help me.

Thanks.
2. (Original post by SamuelN98)
Hey. Please can somone help me with this question.
https://b3755649dbd1afe3db91a899c3b9...20C3%20OCR.pdf
Im confused how to got about question 9(iii) how do i use the fact that it is a translation to help me.

Thanks.
If you like, you can forget about the 5 part as it's the Ae^-kt and the Be^-kt parts that need to be the same.

Now, A and be have to be such that Ae^-kt = Ce^-k(t+60). This is because, as you can see from the graph / the translation, for any value in the first range, 60 seconds later it will be the same in the second range, but the C value is not the B value that we're looking for - it's an intermediate step.

You already know what A is so you just have to define C. It may help to split up the exponential part so that you're left with it being of the form Be^-kt as required, which is going to be something related to the C value which is defined in terms of A.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: June 15, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams