Mixed Sequences

What is the common difference of this arithmetic sequence?

6, 2, -2, -6, ...

• 6

• 2

• 4

• -4

Is this an arithmetic sequence?

1, 5, 9, 13, ...

• Yes

• No

What is the nth term of the quadratic sequence:

-1, 11, 31, 59, ...

• 12n - 13

• 12n² - 13

• 4n² + 5

• 4n² - 5

The first four terms of a sequence are:

5, 11, 21, 35, ...

What is the next term?

The rule for a sequence is 'square the position and then add seven'.

Which of these is the 4th term?

• 9

• 15

• 23

• 121

What does r represent in a geometric sequence?

• Radical

• Common difference

• Common ratio

What is the common ratio of the following sequence:

5, 20, 80, 320, ...

You cannot square from term to term in a geometric sequence, you can only have squareds in quadratic sequences.

• True

• False

What is the FIFTH term in the following geometric sequence:

5, 20, 80, ...

Is this sequence geometric?

7, 77, 777, 7777, ...

• Yes

• No