Week 3 Math 10 Post-Assessment

What is the common ratio 8, -8, 8, -8, 8, …?

• -8

• -1

• 1

• 8

Which of the following is an alternating geometric sequence?

• 3, -4, 5, -6, 7

• 1, 1, 1, 1, 1

• 2, -4, 8, -16

• 1, 5, 25, 125

Which of the following is a geometric sequence?

• 1, 2, 3, 4, 5

• 2, 1, 4, 2, 6

• ½, ¼, 1/6 , 1/9

• 3, 9, 27, 81

Which of the following is a sequence that follows the formula of a_n = 2(2^n-1)?

• 2, 4, 8, 16, 32

• 2, 4, 16, 32, 64

• 2, 4, 8, 64, 124

• 2, 8, 16, 32, 64

Given the first term 1250 and the common ratio as 0.2, what is second, third and fourth term of the sequence?

• 250, -50, 10

• 250, -150, -100

• 250, 200, -10

• 250, 50, 10

An arithmetic sequence is a sequence where every term is obtained by ________ a fixed term to/from the previous term.

• adding

• multiplying

• dividing

• squaring

A geometric sequence is a sequence where every term is obtained by ________ the previous number by a fixed and non-zero number.

• added

• subtracted

• multiplied

• divided

Find the missing term 6,9,12, __ , __ , __

• 15, 18,21

• 14,16,18

• 11,14,17

• 10, 13,15

This sequence 7,15,23,31,… is a ___________.

• Fibonacci

• Harmonic

• Geometric

• Arithmetic

Find the common ratio of this sequence 5,10,20,40,80…

• 6

• 3

• 2

• 1