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Ex 3.2, 21 - The restriction on n, k, p so that PY + WY is

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Ex 3.2, 21 - Chapter 3 Class 12 Matrices - Part 2

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Ex 3.2, 21 (Introduction) Assume X, Y, Z, W and P are matrices of order 2 n, 3 k, 2 p, n 3 , and p k respectively. The restriction on n, k and p so that PY +WY will be defined are: (A) k = 3, p = n (B) k is arbitrary, p = 2 (C) p is arbitrary, k = 3 (D) k = 2, p = 3 Ex 3.2, 21 Assume X, Y, Z, W and P are matrices of order 2 n, 3 k, 2 p, n 3 , and p k respectively. The restriction on n, k and p so that PY +WY will be defined are: (A) k = 3, p = n (B) k is arbitrary, p = 2 (C) p is arbitrary, k = 3 (D) k = 2, p = 3 Order of P is p k Order of Y is 3 k PY = [P]_(p k) [Y]_(3 ) This is possible only if k = 3 So, PY_( ) Now, PY_( ) + WY_( ) is possible if p k = n k p = n Thus p = n and k = 3 Hence, correct answer is A

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.