Q. Which term of the sequence $( - 8 + 18i),\ ( - 6 + 15i),( - 4 + 12i),\$… is purely imaginary?
A) 5th
B) 7th
C) 8th
D) 6th
Explanation
(a)
Given sequence is $( - 8 + 18i),\ ( - 6 + 15i),( - 4 + 12i),( - 2 + 9i),\ (0 + 6i),\ldots$ Hence ,
5th term is purely imaginary.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.