JEE Main 2017MathematicsMatricesMediumMCQ

JEE Main 2017 — Matrices Question with Solution

JEE Main 2017 (02 Apr)

Question

If A=2-3-41 , then Adj3A2+12A is equal to:

Choose an option

Show full solutionCorrect option: B
Correct answer
B51638472

Step-by-step explanation

Given, A=2-3-41

⇒ A2=2-3-41 2-3-41

⇒ A2=4+12-6-3-8-412+1

⇒ A2=16-9-1213

⇒ 3A2=48-27-3639 and  12A=24-36-4812

∴  3A2+12A=72-63-8451

Adj3A2+12A=51846372T=51638472

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About this question

This is a previous-year question from JEE Main 2017, covering the Matrices 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.