QUIZ 1 ADDMATH G11 SERIES & VECTORS

Which of the following is not an Arithmetic Progression?

• 1, 4, 7, 10, .....

• -5, -2, 1, 4, .....

• 3, 7, 12, 16, ......

• 11, 14, 17, 20, .....

Find the 11^th term for: 64, -32, 16, -8, …

• -0.0625

• 0.0625

• -0.03125

• 0.03125

Which sequence is represented by the equation 2(7)^n-1 ?

• 7, 14, 28, 56...

• 2, 9, 16, 23...

• 2, 14, 98, 686...

• 7,9,11,13...

Find the first term of the given sequence:

a₁₄=68

d=3

• 14

• 20

• 26

• 29

Find the 25th term of the sequence if a₁ = 5 and d = 0.5

• 18

• 17

• 16

• 15

Find the sum of the first 20 terms of the sequence 16, 12, 8, 4, ...

• Sn = - 140

• Sn = 140

• Sn = - 440

• Sn = 440

Find the number of even integers from 1 - 100.

• Sn = 2000

• Sn = 2550

• Sn = 2440

• Sn = 2650

Given a₁ = 5, a₆ = 30 Find the sum of the first 6 terms.

• S₆ = 100

• S₆ = 105

• S₆ = 120

• S₆ = 110

Given points A(2, 1) and B(-4, 1). Explain why the vector AB is parallel to the x-axis

• because vector AB is a multiple of the unit vector i

• because vector AB is a multiple of the unit vector j

• because vector AB is a multiple of the unit vector k

• because vector AB is a collinear with x-axis

A ferry departs from A(-25, 28). It takes 3 hours to reach its destination B(20, -32), travelling in as straight line with constant velocity. Distances are in km. Find the velocity vector of the ferry.

• 20i - 15j

• 20i + 15j

• 15i - 20j

• 15i + 20j