A.\({\log _a}b - {\log _a}c = {\log _a}\frac{b}{c}\) 
B.\({\log _a}b - {\log _a}c = {\log _a}\left( {bc} \right)\)
C.\({\log _a}b - {\log _a}c = {\log _a}\left| {b - c} \right|\)
D.\({\log _a}b - {\log _a}c = {\log _a}\left( {b - c} \right)\)

A.\(\int {\left[ {f\left( x \right) + g\left( x \right)} \right]dx}  = \int {f\left( x \right)dx}  + \int {g\left( x \right)dx} \)
B.\(\int {\frac{{f\left( x \right)}}{{g\left( x \right)}}dx}  = \frac{{\int {f\left( x \right)dx} }}{{\int {g\left( x \right)dx} }}\)
C.\(\int {\left[ {f\left( x \right) - g\left( x \right)} \right]dx}  = \int {f\left( x \right)dx}  - \int {g\left( x \right)dx} \)
D.\(\int {kf\left( x \right)dx}  = k\int {f\left( x \right)dx} \) (\(k\) là hàng số khác 0)

A.\({u_3} = 18\)
B.\({u_3} = 10\)
C.\({u_3} = 12\)
D.\({u_3} = 7\)

A.\(1\)
B.\(2\)
C.\(3\)
D.\(0\)

A.\(\frac{{a\sqrt 3 }}{2}\)
B.\(2a\)
C.\(a\sqrt 3 \)
D.\(\frac{{a\sqrt 2 }}{2}\)

A.\(x - y + 2z + 2 = 0\)
B.\(x - y - 2z - 6 = 0\)
C.\(x - y + 2z - 2 = 0\)
D.\( - x + y + 2z - 2 = 0\)

A.\(\left| z \right| = \sqrt {13} \)
B.\(\left| z \right| = 5\)
C.\(\left| z \right| = 13\)
D.\(\left| z \right| = \sqrt 5 \)

A.\(\frac{{79}}{{136}}\)
B.\(\frac{{855}}{{2618}}\)
C.\(\frac{{3705}}{{5236}}\)
D.\(\frac{{57}}{{136}}\)

A.\(V = \frac{{{a^3}}}{3}\)
B.\(V = {a^3}\)
C.\(V = \frac{{{a^3}}}{6}\)
D.\(V = \frac{{{a^3}}}{2}\)

A.
B.
C.
D.