REVISION PURE MATHS 1

b²-4ac is called

• completed squared form

• discrimininant

• root

• quadratic equation

Solve the following linear inequality.

5x-3 ≤ 2x-15

• x ≤ -4

• x ≥ -4

• -4 ≤ x ≤ -4

• x ≥ 4

Find the set of values of k for which x² + kx + 4 = 0 has 2 roots.

• k ≥ 16

• k ≥ 4

• -4 ≤ k ≤ 4

• k ≥ 4 or k ≤ -4

• 6.08 cm

• 3.23 cm

• 16.4 cm

• 3.15 cm

Find the volume of the solid of revolution obtained by rotating the region in bounded by y = x³ + 1, x = 1 and y = 1 about the y-axis.

• 2π/3

• π

• 3π/5

• 2π/5

If the region enclosed by the y-axis, y = 2 and the curve y = √x is revolved about the y-axis, what is the volume of the solid generated?

• 32π/5
• 16π/3
• 16π/5
• 8π/3

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

In circle O, the radius is 4, and the measure of minor arc AB is 120 degrees. Find the length of minor arc AB to the nearest integer.

• 5
• 9
• 8
• 6

Tags

CCSS.HSG.C.B.5

Find the arc length.  Leave your answer in terms of π.

• 7/4π
• 7/2π
• 1/8π
• 45π

What is 3π/4 radians in degrees?

• 315
• 135
• 150
• 330

Tags

CCSS.HSF.TF.A.1

What is 150 degrees in radians?

• 5π/6
• 7π/6
• 5π/4
• π/6