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Construct a3x4m a t r i cA=[a(i j)] whos...

Construct `a3x4m a t r i cA=[a_(i j)]` whose elements are given by `a_(i j)=i+j` (ii) `a_(i j)=i-j`

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Given,`a_(i j)=(i+j)`
Rows=3 and columns =4
`a_(11)=(1+1)=2`,`a_(12)=(1+2)=3`,`a_(13)=(1+3)=4,a_(14)=(1+4)=5`
`a_(21)=(1+2)=3`,`a_(22)=(2+2)=4`,`a_(23)=(3+2)=5,a_(24)=(2+4)=6`
`a_(31)=(3+1)=4`,`a_(32)=(3+2)=5`,`a_(33)=(3+3)=6,a_(34)=(3+4)=7`
matrix=`[[2,3,4,5],[3,4,5,6],[4,5,6,7]]`
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