JEE Main 2015MathematicsDeterminantsEasyMCQ

JEE Main 2015 — Determinants Question with Solution

JEE Main 2015 (11 Apr Online)

Question

If x2+xx+1x-22x2+3x-13x3x-3x2+2x+32x-12x-1=ax-12 , then a is equal to:

Choose an option

Show full solutionCorrect option: B
Correct answer
B24

Step-by-step explanation

Put x=1 on both the sides

22-1430611=a-12

⇒23-0-24-0-14-18=a-12

⇒6-8+14=a-12

⇒12=a-12

⇒24=a.

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About this question

This is a previous-year question from JEE Main 2015, covering the Determinants chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.