The monotone increasing interval of the function y = log12 (x2 − x − 6) is______ .

The monotone increasing interval of the function y = log12 (x2 − x − 6) is______ .

From x2-x-6 > 0, we can get that x < - 2 or X > 3 ∵ t = x2-x-6 = (X-12) 2-254, ∵ function monotonically decreases on (- ∞, 12) ∵ y = log12t is monotonically decreasing in the domain of definition ∵ function y = log12 (x2 − x − 6) monotonically increasing interval is (- ∞, - 2), so the answer is: (- ∞, - 2)