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Saturday, 31 October

JEE Main 2021 · MathsMultiple choiceSingle correctMediumCalculation

JEE Main 31 August 2021, Shift 1, Maths Q70

Question 70 of 90 in this shift, Maths question 10 of 30, Section A.

The integral ∫1(x−1)3(x+2)54 dx\int\frac{1}{\sqrt[4]{(x-1)^3(x+2)^5}}\,dx is equal to : (where C is a constant of integration)
  1. (1)43(x−1x+2)14+C\frac{4}{3}\left(\frac{x-1}{x+2}\right)^{\frac{1}{4}}+\mathrm{C}Official answer
  2. (2)34(x+2x−1)14+C\frac{3}{4}\left(\frac{x+2}{x-1}\right)^{\frac{1}{4}}+\mathrm{C}
  3. (3)43(x−1x+2)54+C\frac{4}{3}\left(\frac{x-1}{x+2}\right)^{\frac{5}{4}}+\mathrm{C}
  4. (4)34(x+2x−1)54+C\frac{3}{4}\left(\frac{x+2}{x-1}\right)^{\frac{5}{4}}+\mathrm{C}

Official answer

Option 1

NTA final key.

Chapter
Integrals

Same idea in other shifts

Asked 2× in all
  1. 9 Jan 2020, Shift 1 · Q62The integral ∫dx(x+4)8/7(x−3)6/7\int\frac{\mathrm{d}x}{(x+4)^{8/7}(x-3)^{6/7}} is equal to : (where C is a constant of integration)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.