JEE Main 2019 — Binomial Theorem Question with Solution
From: JEE Main 2019 (Online) 9th April Morning Slot
Question
If the fourth term in the binomial expansion of
(x > 0) is 20 × 87, then a value of
x is :
Choose an option
Show full solutionCorrect option: B
Correct answer
B82
Step-by-step explanation
Given T4 = 20 × 87
= 20 × 87
20 = 20 × 87
= 86
Taking both side
() = 6
- 3 = 6
- = 2
( - 2)( + 1) = 0
= 2 or = -1
x = 82 or x =
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This is a previous-year question from JEE Main 2019, 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.