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Number and dot products of matrix

 



A

B

1

[[3,5],[2,8]]

[[4,6],[2,4]]

2

=A1.(~.(~*5))

3

=A1.(~.(~*B1(A1.#)(#)))

A2 Multiply a number, each element of A1 is multiplied by 5,return [[15,25],[10,40]]

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A3 Dot products，multiplies matrices A1 and B1 by multiplying corresponding elements,return [[12,30],[4,32]]

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