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# FP2 Complex Numbers

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Why bother with a post grad course - waste of time? 17-10-2016
1. For this question, why can't an equation be x=1/u ? Is it because x and u represent points on different planes so can't be used in the same equation?

I know it says 'line', but what if it didn't specify whether it was a line/curve?

Thanks for any help.
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2. They have to be variables in the same plane, you can't mix u and x and y and v like that.
3. (Original post by B_9710)
They have to be variables in the same plane, you can't mix u and x and y and v like that.

So it's impossible to have an equation containing variables from different planes?
4. (Original post by PhyM23)

So it's impossible to have an equation containing variables from different planes?
Yeah. You can't have an equation for a line that is in 2 different planes (what does that's even mean?). I mean the complex function is an equation with variables from 2 different planes, but it's a transformation not a curve/line.
5. (Original post by B_9710)
Yeah. You can't have an equation for a line that is in 2 different planes (what does that's even mean?). I mean the complex function is an equation with variables from 2 different planes, but it's a transformation not a curve/line.

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