Construct a 3×4 matrix A = [a jj ] whose elements a jj are given by : a jj = 2i

Question

Philoid · Accepted Answer

Let A = [a_ij]_2×3

So, the elements in a 3×4 matrix are

a₁₁, a₁₂, a₁₃, a_14, a₂₁, a₂₂, a₂₃,a₂₄,a_31,a_32,a_33,a₃₄

A = ……(1)

a₁₁ = 2×1 = 2 a₁₂ = 2×1 = 2 a₁₃ = 2×1 = 2 a₁₄ = 2×1 = 2

a₂₁ = 2×2 = 4 a₂₂ = 2×2 = 4 a₂₃ = 2×2 = 4 a_{24 =} 2×2 = 4

a₃₁ = 2×3 = 6 a₃₂ = 2×3 = 6 a₃₃ = 2×3 = 6 a₃₄ = 2×3 = 6

So, from (1)

A =