Sequences and Series 3 Question 6
6. If and be three distinct real numbers in GP and , then cannot be
(2019 Main, 9 Jan I)
(a) 4
(b) 2
(c) -2
(d) -3
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Answer:
Correct Answer: 6. (b)
Solution:
- Let
and , where is the common ratio.
We know that,
and
Hence,
Alternate Method
From Eq. (i), we have
For real solution of