Question

If A = `["a"_("ij")]` is a 2 x 3 matrix, such that `"a"_("ij") = ("-i" + 2"j")^2/5.` then a₂₃ is ____________.

Options

• `1/5`

• `2/5`

• `9/5`

• `16/5`

Answer 1

If A = `["a"_("ij")]` is a 2 x 3 matrix, such that `"a"_("ij") = ("-i" + 2"j")^2/5.` then a₂₃ is `underline(16/5)`.

Explanation:

as `"a"_23 = (-2 + 6)^2/5 = 16/5`