The precise interval on which the function $f(x) = \log_{1/2}\left(x^2 - 2x - 3\right)$ is monotonically decreasing, is (A) $(-\infty, -1)$ (B) $(-\infty, 1)$ (C) $(1, \infty)$ (D) $(3, \infty)$
The precise interval on which the function $f(x) = \log_{1/2}\left(x^2 - 2x - 3\right)$ is monotonically decreasing, is\\
(A) $(-\infty, -1)$\\
(B) $(-\infty, 1)$\\
(C) $(1, \infty)$\\
(D) $(3, \infty)$