Question

Construct a 3 × 4 matrix A = [a_ij] whose elements a_ij are given by:

 a_ij = 2i

Answer 1

a_ij = 2i

Here,

`a_11=2(1)=2 , a_12=2(1)=2,a_13=2(1)=2, a_14=2(1)=2`

`a_21=2(2)=4,a_22=2(2)=4, a_23=2(2)=4 , a_24 = 2(2)=4`

`a_31=2(3)=6, a_23=2(3)=6,a_33=2(3)=6  and a_34=2(3)=6` 

So, the required matrix is `[[2  2  2  2  ],[4  4  4  4],[6  6  6  6 ]]`