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Saturday, 31 October

JEE Main 2023 · MathsNumerical answerNumerical valueMediumCalculation

JEE Main 10 April 2023, Shift 2, Maths Q21

Question 21 of 90 in this shift, Maths question 21 of 30, Section B.

If the domain of the function f(x)=sec⁡−1(2x5x+3)f(x) = \sec^{-1}\left(\frac{2x}{5x+3}\right) is [α,β)∪(γ,δ][\alpha, \beta) \cup (\gamma, \delta], then ∣3α+10(β+γ)+21δ∣|3\alpha + 10(\beta + \gamma) + 21\delta| is equal to ________.

Official answer

24

NTA final key.

Same idea in other shifts

Asked 2× in all
  1. 18 Mar 2021, Shift 1 · Q71The real valued function f(x)=cosec−1xx−[x]f(x)=\dfrac{\mathrm{cosec}^{-1}x}{\sqrt{x-[x]}}, where [x][x] denotes the greatest integer less than or equal to…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.