1.

यदि `A={:[(1,-1),(-1,1)]" तथा "B=[(1,1),(1,1)]:}` तो आव्यूह AB होगा -

Answer» `AB={:[(1,-1),(-1,1)].[(1,1),(1,1)]:}`
`={:[(1.1+(-1).1,1.1+(-1).1),((-1).1+1.1,(-1).1+1.1)]:}`
`={:[(1-1,1-1),(-1+1,-1+1)]=[(0,0),(0,0)]=0:}`


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