JEE Main 2021 — Binomial Theorem Question with Solution
From: JEE Main 2021 (Online) 25th July Morning Shift
Question
The ratio of the coefficient of the middle term in the expansion of (1 + x)20 and the sum of the coefficients of two middle terms in expansion of (1 + x)19 is _____________.
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Show full solutionCorrect answer: 1
Correct answer
1
Step-by-step explanation
Coeff. of middle term in (1 + x)20 = & Sum of coeff. of two middle terms in (1 + x)19 = +
So required ratio =
So required ratio =
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This is a previous-year question from JEE Main 2021, covering the Binomial Theorem 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.