$\log ab - \log |b| = $
$\log a$
$\log |a|$
$ - \log a$
None of these
The number of real values of the parameter $k$ for which ${({\log _{16}}x)^2} - {\log _{16}}x + {\log _{16}}k = 0$ with real coefficients will have exactly one solution is
If ${\log _{0.04}}(x - 1) \ge {\log _{0.2}}(x - 1)$ then $x$ belongs to the interval
${\log _7}{\log _7}\sqrt {7(\sqrt {7\sqrt 7 } )} = $
If $\log x:\log y:\log z = (y - z)\,:\,(z - x):(x - y)$ then
If ${\log _4}5 = a$ and ${\log _5}6 = b,$ then ${\log _3}2$ is equal to