SATHEE: Sequence And Series Question 389

Sequence And Series Question 389

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

Options:

5th

7th

8th

6th

Show Answer

Answer:

Correct Answer: A

Solution:

Given sequence is $ \frac{p+q-r-p}{(r+p)(p+q)}=\frac{q+r-p-q}{(q+r)(r+p)} $ Hence $ 5^{th} $ term is purely imaginary.

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Sequence And Series Question 389

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

Options:

Answer:

Solution:

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