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    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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    They have to be variables in the same plane, you can't mix u and x and y and v like that.
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    (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.
    Thanks for the reply.

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

    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.
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    (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.
    Awesome. Thanks very much for your your help.
 
 
 
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