Monomath – CBSE | GSEB | IB | JEE Maths by Ajay Yadav (Math King of Katargam) – 15+ Years Experience. Study Notes, Video Lessons, Formula Sheets & PYQs.
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Matrices

Previous Year Questions (2022-2024)

📅 Year 2022

  1. If A = [[1,2],[3,4]] and B = [[2,0],[1,2]], find AB and BA. Is AB = BA?
    Show Solution
    AB = [[4,4],[10,8]]\nBA = [[2,4],[7,10]]\nAB ≠ BA. Matrix multiplication is not commutative.
  2. Find inverse of A = [[2,3],[1,4]].
    Show Solution
    det A = 8-3 = 5\nA^{-1} = 15[[4,-3],[-1,2]]

📅 Year 2023

  1. If A = [[1,2],[3,4]] and B = [[2,0],[1,2]], find AB and BA. Is AB = BA?
    Show Solution
    AB = [[4,4],[10,8]]\nBA = [[2,4],[7,10]]\nAB ≠ BA. Matrix multiplication is not commutative.
  2. Find inverse of A = [[2,3],[1,4]].
    Show Solution
    det A = 8-3 = 5\nA^{-1} = 15[[4,-3],[-1,2]]

📅 Year 2024

  1. If A = [[1,2],[3,4]] and B = [[2,0],[1,2]], find AB and BA. Is AB = BA?
    Show Solution
    AB = [[4,4],[10,8]]\nBA = [[2,4],[7,10]]\nAB ≠ BA. Matrix multiplication is not commutative.
  2. Find inverse of A = [[2,3],[1,4]].
    Show Solution
    det A = 8-3 = 5\nA^{-1} = 15[[4,-3],[-1,2]]