JEE Main 2022 · MathsNumerical answerNumerical valueMediumCalculation

JEE Main 26 July 2022, Shift 1, Maths Q25

Question 25 of 90 in this shift, Maths question 25 of 30, Section B.

If the coefficients of

x

and

x^2

in the expansion of

(1 + x)^{\mathrm{p}}\ (1 - x)^{\mathrm{q}}

\mathrm{p},\ \mathrm{q} \leq 15

, are

-3

and

-5

respectively, then the coefficient of

x^3

is equal to __________.

Official answer

NTA final key.

Chapter: Binomial Theorem
Topic: Binomial Coefficients
Idea tested: Coefficient Extraction from Products

Same idea in other shifts

Asked 6× in all

5 Apr 2024, Shift 1 · Q24If the constant term in the expansion of $(1+2x-3x^3)\left(\frac{3}{2}x^2-\frac{1}{3x}\right)^9$ is $p$ , then $108p$ is equal to ________.MediumNumerical value
1 Feb 2024, Shift 1 · Q23If the Coefficient of $x^{30}$ in the expansion of $\left(1+\frac{1}{x}\right)^6(1+x^2)^7(1-x^3)^8$ ; $x\neq0$ is $\alpha$ , then…HardNumerical value
31 Jan 2024, Shift 1 · Q24In the expansion of $(1+x)(1-x^2)\left(1+\frac{3}{x}+\frac{3}{x^2}+\frac{1}{x^3}\right)^5,\ x\neq0$ , the sum of the coefficients of $x^3$ …MediumNumerical value
30 Jul 2022, Shift 2 · Q82If $p_1$ and $p_2$ , respectively, are the second largest and the fourth largest prime numbers in the factorization of the coefficient of…HardNumerical value
28 Jun 2022, Shift 2 · Q4The term independent of $x$ in the expansion of $(1-x^2+3x^3)\left(\frac{5}{2}x^3-\frac{1}{5x^2}\right)^{11}$ , $x \neq 0$ is :MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.