Google 表格：ArrayFormula：AND() 的替代方法

Question

I understand that using AND() within an ArrayFormula doesn't work, but I haven't found an alternative that I understand.

In col UI have entered an ordinary formula which is copied down the rows. In col T, I wrapped it in an ArrayFormula, which does not work.

I've read on this forum about using "multiplication of truth values" instead, but have no understanding what that means, let alone how to implement it.

Answer 1

use:

=INDEX(IF((A2:A13>=58)*(A2:A13<=68), A2:A13, 
       IF((B2:B13>=58)*(B2:B13<=68), B2:B13, )))