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Friday, 9 October

JEE Main 2021 · MathsNumerical answerNumerical valueHardMulti-step

JEE Main 16 March 2021, Shift 2, Maths Q90

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

Let Sn(x)=log⁡a1/2x+log⁡a1/3x+log⁡a1/6x+log⁡a1/11x+log⁡a1/18x+log⁡a1/27x+…S_n(x)=\log_{a^{1/2}}x+\log_{a^{1/3}}x+\log_{a^{1/6}}x+\log_{a^{1/11}}x+\log_{a^{1/18}}x+\log_{a^{1/27}}x+\ldots up to n-terms, where a>1a>1. If S24(x)=1093S_{24}(x)=1093 and S12(2x)=265S_{12}(2x)=265, then value of a is equal to ________.

Official answer

16

NTA final key.

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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 42 of the 174 JEE Main shifts held from 2017 to 2026.