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

Which term of the sequence \[(-8+18i),\,(-6+15i),\] \[(-4+12i)\]\[,...

1.	Which term of the sequence \[(-8+18i),\,(-6+15i),\] \[(-4+12i)\]\[,......\]is purely imaginary
A.	5th
B.	7th
C.	8th
D.	6th
Answer» B. 7th

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

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