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Question

a+ib and c+id can be compared when .

A
a=0 and b=0
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B
a=0 and c=0
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C
c=0 and d=0
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D
b=0 and d=0
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Solution

The correct option is D b=0 and d=0

We cannot compare 2 complex numbers as they have imaginary parts.

a + ib > c + id or a + ib < c + id are meaningful as statements if and only if imaginary parts are zero, i.e., b = 0 and d = 0.


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