JEE Main 2020 — Sequences And Series Question with Solution
From: JEE Main 2020 (Online) 2nd September Morning Slot
Question
The sum of the first three terms of a G.P. is S and
their product is 27. Then all such S lie in :
Choose an option
Show full solutionCorrect option: D
Correct answer
D(-, -3] [9, )
Step-by-step explanation
Let three terms of G.P. are , a, ar
= S ...(1)
and a3 = 27
a = 3
= S
As or
or
or
S 9 or S -3
S (-, -3] [9, )
= S ...(1)
and a3 = 27
a = 3
= S
As or
or
or
S 9 or S -3
S (-, -3] [9, )
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