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JEE Main 2021 · MathsMultiple choiceSingle correctEasyCalculation

JEE Main 26 February 2021, Shift 1, Maths Q64

Question 64 of 90 in this shift, Maths question 4 of 30, Section A.

The value of

\begin{vmatrix}(a+1)(a+2) & a+2 & 1\\ (a+2)(a+3) & a+3 & 1\\ (a+3)(a+4) & a+4 & 1\end{vmatrix}

is :

(1) $(a+1)(a+2)(a+3)$
(2) $(a+2)(a+3)(a+4)$
(3) $-2$ Official answer
(4) $0$

Official answer

Option 3

NTA final key.

Chapter: Determinants
Topic: No close match in our taxonomy
Idea tested: No close match in our taxonomy

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.