Same chapter2 marksDifficulty: Easy
If A is a 2 × 3 matrix and B is a 3 × 4 matrix, state the order of AB.
Matrices
2 marksDifficulty: Easy
If A = [[3, 0], [0, 3]], find A2.
Original Khojo Papers practice question — not from a past board paper.
Answer
A2 = [[9, 0], [0, 9]]
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A is 3 times the identity matrix, so A2 = 9I = [[9, 0], [0, 9]].
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Easy
If A = [[2, 0], [−1, 3]] and B = [[1, 4], [2, −1]], find A + B and A − B.
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Same chapter2 marksDifficulty: Easy
If A = [[1, −2], [3, 0]], find 2A.
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Same chapter1 markDifficulty: Easy
The order of the matrix [[1, 2, 3], [4, 5, 6]] is:
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Same chapter1 markDifficulty: Easy
The product of a 2 × 3 matrix and a 3 × 2 matrix is a matrix of order:
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Same chapter3 marksDifficulty: Medium
Find the product [[1, 2], [3, 4]] × [[2, 0], [1, 3]].
Matrices