Sequence And Series Question 389
Question: Which term of the sequence $ (-8+18i),,(-6+15i), $ $ (-4+12i) $ $ ,…… $ is purely imaginary
Options:
A) 5th
B) 7th
C) 8th
D) 6th
Show Answer
Answer:
Correct Answer: A
Solution:
Given sequence is $ \frac{p+q-r-p}{(r+p)(p+q)}=\frac{r+p-q-r}{(q+r)(r+p)} $ Hence $ 5^{th} $ term is purely imaginary.
BETA
