1. Let matrices be 6 -2 -21 94-4 [3 1 B = 4 7 0 C=0-2 A 10 -3 1 -10 5 1 1-4 0 11 [4 0 a = 1 b=[308] 2. Calculate the following products and sums or give reasons why they are not defined. i. Aa, Ab, AbT, AB İİ. AB, BA, AAT, ATA iii. a¹A, bA, 5B(3a + 2b¹), 15Ba + 10Bb™ iv. B³, BC, (BC)², (BC) (BC)T v. aTCCTa, aTC²a, bCTCb¹, bCCTbT

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