JEE Main 2021 — Binomial Theorem Question with Solution
From: JEE Main 2021 (Online) 27th July Morning Shift
Question
If the coefficients of x7 in and x7 in , b 0, are equal, then the value of b is equal to :
Choose an option
Show full solutionCorrect option: C
Correct answer
C1
Step-by-step explanation
Coefficient of x7 in :
General Term =
=
Required Term =
Coefficient of x7 in :
General Term =
=
Required Term =
According to the question,
Since, b 0 b = 1
General Term =
=
Required Term =
Coefficient of x7 in :
General Term =
=
Required Term =
According to the question,
Since, b 0 b = 1
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Binomial Theorem chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
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.