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Question

If x+iy=±(a+ib), then find xiy.

A
=±(a+ib)
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B
=±(aib)
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C
=±(b+ia)
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D
=±(bia)
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Solution

The correct option is C =±(bia)
Given, x+iy=±(a+bi)
x+iy=a2b2+2iab
x=a2b2,y=2ab
xiy=(a2b2)2iab
=b2+(ia)22iab
=(bia)2
=±(bia)
Ans: D

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