You are Here: Home >< Maths

Natural log simultaneous equations

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. Anyone help with these?

x-y=e^5-e^2
ln(x)+ln(y)=7
2. (Original post by sch0501)
Anyone help with these?

x-y=e^5-e^2
ln(x)+ln(y)=7
ln(x)+ln(y)=ln(xy)=7

You can get xy from that, hence y, so sub it into the first one solve for x. Then get y.
Be careful with one of the solutions though as it will not be valid, try and see why.
3. (Original post by RDKGames)
ln(x)+ln(y)=ln(xy)=7

You can get xy from that, hence y, so sub it into the first one solve for x. Then get y.
Be careful with one of the solutions though as it will not be valid, try and see why.
thanks

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: September 13, 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

Chat with other maths applicants