1st Mathematics Monthly Exam 10

What defines an arithmetic sequence?

• A sequence with a constant ratio

• A sequence with a constant difference

• A sequence of random numbers

• A sequence with increasing powers

In the sequence 3, 7, 11, 15, … what is the common difference d?

• 3

• 4

• 7

• 11

Which of the following is a finite arithmetic sequence?

• 2, 5, 8, 11, …

• 1, 3, 5, 7, 9

• 10, 15, 20, 25, 30, 35

• 1, 4, 7, 10, …

What is the general formula for the nth term of an arithmetic sequence?

• an=a1×rn-1

• an=a1+n-1d

• an=a1+nd

• an=a1-n-1d

Find the 10th term of the sequence 2, 5, 8, 11, …

• 29

• 30

• 32

• 35

If a1 = 7 and d = 3, what is a5?

• 19

• 21

• 22

• 25

What is the sum of the first 5 terms of the sequence 1, 4, 7, 10, 13?

• 25

• 35

• 40

• 45

Which formula can be used to find the sum of the first n terms of an arithmetic sequence?

• Sn=n×a1×d

• Sn=n22a1+n+1d

• Sn=a1×an

• sn=a1×rn-1

In the sequence 10, 8, 6, 4, … what is the value of d?

• 2

• -2

• 4

• -4

Find the sum of the first 8 terms of the sequence 3, 7, 11, 15, …

• 120

• 124

• 128

• 132