Here's the question
Here's my attempt
If z is in imaginary axis, that's x=0, so if I take the bits I have highlighted in red, and set them to zero ... looks like a circle to me not a line?
I must be doing something really stupid?
... ok spotted problem !!
Thanks for posting! You just need to create an account in order to submit the post
Already a member?
Oops, something wasn't right
please check the following:
Not got an account?
Sign up now
© Copyright The Student Room 2016 all rights reserved
The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.
Register Number: 04666380 (England and Wales), VAT No. 806 8067 22
Registered Office: International House, Queens Road, Brighton, BN1 3XE