Hàm số bậc 2

Define the axis of symmetry

• I (2;-1)

• I (-1;2)

• I (1,-1)

• I (3;2)

y = 5x² + 4x – 1

Define the vertex of the function.

• The vertex of the function is (2, 10)
• The vertex of the function is (-2/5, -9/5)

• The vertex of the function is (0, 4)
• The vertex of the function is (1, 5)

What does "Bảng biến thiên" mean?

• Monotonicity of functions

• Vertex

• Discriminant

• Variation table

y = – x² + 2x + 3.

Will the parabola open upward or open downward?

• Neither of them

• Both

• open upward
• open downward

y = – x² + 2x + 3

How it can be stated?

• y is equal to negative 3 squares plus x minus x

• y is equal to negative x squares plus 2x plus 3

• y is equal to negative 2x squares plus x minus 3

• y is equal to negative x squares plus 2x minus 1

What is the maxium value of y = 4x² + 6x – 5

• The maximum value of y is 7 at x = -3/4.
• The maximum value of y is 10 at x = 2
• The maximum value of y is -3 at x = 1
• The maximum value of y is 0 at x = 0

What is the standard form of quadratic function?

• y = (x + a)(x + b)
• y = ax^2 + bx + c
• y = mx + b
• y = a^2 + b^2 + c^2

y = 4x² + 6x – 5

Finding the increasing interval of the function.

• The function will increase on the interval from -3/4 to positive infinity.

• The function will increase on the interval from negative infinity to -29/4.

• The function will increase on the interval from -29/4 to positive infinity.

• The function will increase on the interval from negative infinity to -3/4.

How can we pronounce "Parabol" in English?

• Pa-ra-bon

• Parabola

• Paracetamol

• Barapola

Regarding the given table, determine the coefficients of the function.

• a>0, b>0, c<0

• a<0, b<0, c>0

• a=0, b>0, c<0

• a<0, b>0, c<0