A.\(\sqrt 5 \)
B.\(\dfrac{{\sqrt {38} }}{4}\)
C.\(\sqrt {35} \)
D.\(\dfrac{{\sqrt {26} }}{2}\)

A.\(m \ge \dfrac{1}{3}\left[ {f\left( {\dfrac{\pi }{2}} \right) - 1} \right]\)
B.\(m \ge \dfrac{1}{3}f\left( {\dfrac{\pi }{4}} \right) - \dfrac{1}{6}\)
C.\(m \ge \dfrac{1}{3}f\left( 0 \right)\)
D.\(m > \dfrac{1}{3}\left[ {f\left( {\dfrac{\pi }{2}} \right) - 1} \right]\)

A.\(\dfrac{1}{{2\sqrt {14} }}\)
B.\(\dfrac{2}{{\sqrt {14} }}\)
C.\(\dfrac{1}{{\sqrt {14} }}\)
D.\(\dfrac{3}{{2\sqrt {14} }}\)

A.\(8\)
B.\(9\)
C.\(7\)
D.\(6\)

A.hồ tiêu, lạc
B.mía, thuốc lá.
C.cao su, điều.
D.cà phê, dừa

A.\(1\)
B.\(C_{10}^4\)
C.\(4!\)
D.\(A_{10}^4\)

A.interrupted
B.moved back
C.started suddenly
D.backed up

A.expectation
B.insurance
C.expectancy
D.assurance

A.who
B.whom
C.what
D.that

A.Otherwise
B.For example
C.Moreover
D.However