Understanding Arithmetic Sequences

What is the defining characteristic of an arithmetic sequence?

• It has a constant difference between terms.

• It has a variable difference between terms.

• It has a constant sum between terms.

• It has a constant ratio between terms.

In an arithmetic sequence, if the first term is 'a' and the common difference is 'd', what is the formula for the second term?

• a + 2d

• 2a + d

• a + d

• a - d

How can the third term of an arithmetic sequence be expressed if the first term is 'a' and the common difference is 'd'?

• a + 2d

• a + 3d

• a + d

• a + 4d

If the first term of an arithmetic sequence is 4 and the common difference is 4, what is the sixth term?

• 32

• 28

• 24

• 20

What is the common difference in an arithmetic sequence where the first term is 4 and the sequence is 4, 8, 12, 16?

• 4

• 5

• 3

• 2