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Condition That 2 Lines Are Coplanar

lf z1 and ...

Question

lf $z_{1}$ and $z_{2}$ are purely real then $z_{1},_{2},_{1} z_{2}$ form a

A

parallogram

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B

square

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C

rhombus

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D

straight line

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Solution

The correct option is D straight line
If $z_{1}$ and $z_{2}$ are purely real.
Then
$z_{1} =_{1}$ and
$z_{2} =_{2}$
Thus the points
$z_{1},_{2},_{1}, z_{2}$ will be collinear, thus forming a straight line.

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Condition That 2 Lines Are Coplanar

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