Signum and greatest integer functions
Sets, relations and functions · Mathematics
Study notes
Q: Evaluate (a) sgn(-5), sgn(0), sgn(3.2) (b) [4.9], [-4.9], [7]. (a) sgn(-5) = -1, sgn(0) = 0, sgn(3.2) = 1. (b) [4.9] = 4, [-4.9] = -5 (greatest integer ≤ -4.9!), [7] = 7.