Arithmetic Sequence Nth Term

Which of the following is the correct formula in finding the nth term of an arithmetic sequence?

• a_n = a₁ + (n - 1)d

• a_n = a₁ + (n + 1)d

• a_n = a₁ - (n - 1)d

• a_n = a₁ - (n + 1)d

Which of the following is a correct description of an arithmetic sequence?

• A term is obtained by multiplying a constant number from the preceding term.

• A term is obtained by squaring the preceding term.

• A term is obtained by adding a constant number to the preceding term.

• A term is obtained by extracting the square root of the preceding term.

What is the 7th term in the sequence

7, 11, 15, … ?

• 30

• 31

• 32

• 33

Find the next three terms in the arithmetic sequence: -3, -8, -13, -18, ...

• -20, -24, -28

• -21, -25, -29

• -23, -28, -33

• -24, -29, -32

Find the 20th term in the arithmetic sequence: 5, 12, 19, 26...

• 145

• 144

• 142

• 138

Find the missing terms of the arithmetic sequence:

• 160, 175, 190

• 165, 185, 195

• 155, 165, 175

• 190, 175, 160

An arithmetic sequence is an ordered set of numbers that

have a ___________ between each consecutive term.

• addition

• multipilcation

• subtract

• common difference

Which sequence is NOT an arithmetic sequence?

• -7, -13, -19, -25,...

• -10, -6, -2, 2,..

• 6, 8, 10, 12,...

• 3, 15, 75, 375,...

What is the common difference in the sequence 6b, 9b, 12b, 15b?

• 3

• 3b

• -3

• -3b

What is the common difference in the sequence:

-4, 3, 10, 17, …?

• 1

• 7

• -1

• -7