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Question

Which term of the sequence (-8 + 18i), (-6 + 15i), (-4 + 12i),....is purely imaginary

A

5th

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B

7th

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C

8th

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D
6th
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Solution

The correct option is A

5th


Given sequence is (-8 + 18i), (-6 + 15i), (-4 + 12i), (-2 + 9i), (0 + 6i),.....
Hence 5th term is purely imaginary.

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