JEE Main 2021 — Sequences And Series Question with Solution
From: JEE Main 2021 (Online) 16th March Evening Shift
Question
Let , a and b be in G.P. and , , 6 be in A.P., where a, b > 0. Then 72(a + b) is equal to ___________.
Enter your answer
Show full solutionCorrect answer: 14
Correct answer
14
Step-by-step explanation
and
Solving, we get or [rejected]
if
Solving, we get or [rejected]
if
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This is a previous-year question from JEE Main 2021, covering the Sequences And Series chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.