1.

यदि `A={:[(1,2,5),(3,4,6)],B=[(4,0),(2,1),(1,5)]:}` तो AB तथा BA ज्ञात कीजिये।

Answer» यहाँ `A={:[(1,2,5),(3,4,6)],B=[(4,0),(2,1),(1,5)]:}`
`AB=[(1.4+2.2+5.1,1.0+2.1+5.5),(3.4+4.2+6.1,3.0+4.1+6.5)]=[(13,27),(26,34)]:}`
और `BA={:[(4.1+0.3,4.2+0.4,4.5+0.6),(2.1+1.3,2.2+1.4,2.5+1.6),(1.1+5.3,1.2+5.4,1.5+5.6)]:}`
`={:[(4+0,8+0,20+0),(2+3,4+4,10+6),(1+15,2+20,5+30)]:}`
`={:[(4,8,20),(5,8,16),(16,22,35)]:}`


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