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Ex 3.3, 4 - Chapter 3 Class 12 Matrices (Term 1)

Last updated at March 30, 2023 by

Ex 3.3, 4 - Find (A + 2B)' if A' = [-2 1 3 2] - Matrices CBSE

Ex 3.3, 4 - Chapter 3 Class 12 Matrices - Part 2

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Ex 3.3, 4 If A’ = [■8(−2&[email protected]&2)] and B = [■8(−1&[email protected]&2)] , then find (A + 2B)’ We need to find (A + 2B)’ Finding A A’ = [■8(−2&[email protected]&2)] A = (A’)’= [■8(−2&[email protected]&2)] Also, B = [■8(−1&[email protected]&2)] 2B = 2 [■8(−1&[email protected]&2)] = [■8(2(−1)&2(0)@2(1)&2(2))] = [■8(−2&[email protected]&4)] Now A + 2B = [■8(−2&[email protected]&2)] + [■8(−2&[email protected]&4)] = [■8(2+(−2)&[email protected]+2&2+4)] = [■8(0&[email protected]&6)] ∴ (A + 2B) = [■8(−4&[email protected]&6)] So, (A + 2B)’ = [■8(−4&[email protected]&6)]

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