JEE Main 2021 — Binomial Theorem Question with Solution
From: JEE Main 2021 (Online) 25th July Evening Shift
Question
If the co-efficient of x7 and x8 in the expansion of are equal, then the value of n is equal to _____________.
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Show full solutionCorrect answer: 55
Correct answer
55
Step-by-step explanation
n 7 = 48 n = 55
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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.