A.\({u_{10}} = 20\)
B.\({u_{10}} = 21\)
C.\({u_{10}} = 19\)
D.\({u_{10}} = 15\)

A.\(4\pi {a^2}\)
B.\(2\pi {a^2}\)
C.\(\pi {a^2}\)
D.\(\dfrac{4}{3}\pi {a^2}\)

A.\(6x - 4y + 3z - 12 = 0\)
B.\(\dfrac{x}{2} + \dfrac{y}{{ - 3}} + \dfrac{z}{4} = 0\)
C.\(6x - 4y + 3z = 0\)
D.\(\dfrac{x}{2} + \dfrac{y}{3} - \dfrac{z}{4} = 1\)

A.\(\left( {3;2} \right)\)
B.\(\left( {3; - 2} \right)\)
C.\(\left( { - 2;3} \right)\)
D.\(\left( {2; - 3} \right)\)

A.\( - 2\)
B.\(4\)
C.\( - 4\)
D.\(2\)

A.\(\int {f\left( x \right)dx}  = \dfrac{1}{2}\ln \left| {3x + 1} \right| + C\)
B.\(\int {f\left( x \right)dx}  = \dfrac{1}{3}\ln \left| {3x + 1} \right| + C\)
C.\(\int {f\left( x \right)dx}  = \dfrac{1}{3}\ln \left( {3x + 1} \right) + C\)
D.\(\int {f\left( x \right)dx}  = \ln \left| {3x + 1} \right| + C\)

A.\(y = {x^4} + 2{x^2} + 2\)
B.\(y =  - {x^4} + 2{x^2} - 2\)
C.\(y =  - {x^4} + 2{x^2} + 1\)
D.\(y = {x^4} - 2{x^2} - 1\)

A.interact
B.interaction
C.interactor
D.interacting

A.complication
B.difficulty
C.simplicity
D.complexion

A.benefits
B.interests
C.concerns
D.disadvantages