x Turn on thread page Beta
 You are Here: Home >< Maths

# Complex numbers watch

1. Hi can some one help please

what is ln(I)

and what is I ^i

any ideas
thanks
2. (Original post by meme12)
Hi can some one help please

what is ln(I)

and what is I ^i

any ideas
thanks
Is that 1 or l?

Posted from TSR Mobile
3. If you're just looking for a tip, then I'd imagine rewriting i in exponential form will help.

z=re^i*theta

Posted from TSR Mobile
4. That is I not 1
5. (Original post by meme12)
That is I not 1
I do not know what I is but

ln(i) = (iπ)/2

ii=e-π/2
6. Could you explain please how did you get the result
7. (Original post by meme12)
Could you explain please how did you get the result
ln(i) = ln|i|+iarg(i)=0+i . π/2 =(iπ)/2

for the second
ii = elnii=eilni and use part (a)
8. As TeeEm says, the (principle) log of a complex number has the definition:

what`s the mod of i, and the argument of i?
9. Thanks

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:
Updated: January 20, 2015
Today on TSR

### Any tips for freshers...

who are introverts?

### More snow?!

Discussions on TSR

• Latest
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest

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