Q; g: R_R g(x) =x²-4x+3
which statement is correct ;
1. g is strictly monotonically decreasing on the interval (-∞,2]
2. g is monotonically increasing on interval (-∞,2]
3. g is strictly monotonically increasing on interval (-∞,2]
4. g is strictly monotonically decreasing on the interval (2,∞)
5. none of them