A.work together
B.work individually
C.work enthusiastically
D.work responsibly

A.\(280\;c{m^2}\)
B.\(1700\;c{m^2}\)
C.\(1400\;c{m^2}\)
D.\(1600\;c{m^2}\)

A.\( - 2\)
B.\(3\)
C.\(2\)
D.\( - 3\)

A.\(21\)
B.\(6\pi \)
C.\(6\)
D.\(21\pi \)

A.\(1\)
B.\(\dfrac{\pi }{2}\)
C.\( - \dfrac{\pi }{2}\)
D.\( - 1\)

A.\(I =  - \smallint tdt\)
B.\(I = \smallint \dfrac{1}{t}dt\)
C.\(I = \smallint tdt\)
D.\(I = \smallint {t^2}dt\)

A.\({60^0}\)
B.\({135^0}\)
C.\({30^0}\)
D.\({45^0}\)

A.\(2\)
B.\( - 2\)
C.\(1\)
D.\( - 1\)

A.\(S =  - \mathop \smallint \limits_{ - 1}^1 f\left( x \right)dx + \mathop \smallint \limits_1^4 f\left( x \right)dx\)
B.\(S = \mathop \smallint \limits_{ - 1}^1 f\left( x \right)dx + \mathop \smallint \limits_1^4 f\left( x \right)dx\)
C.\(S = \mathop \smallint \limits_{ - 1}^1 f\left( x \right)dx - \mathop \smallint \limits_1^4 f\left( x \right)dx\)
D.\(S =  - \mathop \smallint \limits_{ - 1}^1 f\left( x \right)dx - \mathop \smallint \limits_1^4 f\left( x \right)dx\)

A.\(\left( {4;7;5} \right)\)
B.\(\left( { - 4;7;5} \right)\)
C.\(\left( {8;14;10} \right)\)
D.\(\left( { - 8;14;10} \right)\)