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Question

If Z1,Z2,Z3 are complex numbers such that |Z1|=|Z2|=|Z3|=1 and Z1+Z2+Z3=0, then area of triangle whose vertices Z1,Z2 and Z3 is


A
2
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B
1
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C
34
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D
334
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Solution

The correct option is D 334
|Z1+Z2|2+|Z1Z2|2=2(|Z1|2+|Z2|2)|Z3|2+|Z1Z2|2=2(1+1)|Z1Z2|2=3 |Z1Z2|=3
Similarly, |Z2Z3|2=3 |Z1Z2|=3
Z1,Z2,Z3 forms an equilateral triangle with area =34a2=334sq.units

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