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Question

The conjugate of complex number 23i4i is .

A
2+3i4i
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B
11+10i17
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C
1110i17
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D
2+3i4i
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Solution

The correct option is B 11+10i17

Rationalize the given complex number by multiplying both the numerator and the denominator with 4+i.

23i4i × 4+i4+i = 810i+316+1 = 1110i17

Its conjugate is 11+10i17.


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