summative 1 (math 10)

Which of the following does not belong to the group?

• 2, -6, 18, -54

• 6, 12, 18, 24

• 3, -6, 12, -24

• 2, 4, 8, 16

Which of the following is an example of an arithmetic sequence?

• 4, 8, 16, 32, 64

• 15, 13, 11, 9, 7

• 1, 2, 4, 7, 11

• 3, 6, 12, 24, 48

Which of the following is an example of an arithmetic sequence?

• 4, 8, 16, 32, 64

• 15, 13, 11, 9, 7

• 1, 2, 4, 7, 11

• 3, 6, 12, 24, 48

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

What is the next term in this sequence?

-5, 15, -45, 135, ______, ...

• -405

• 450

• 405

• -450

If three arithmetic means are inserted between -15 and 9, find the first of these arithmetic means.

• 3

• -3

• 6

• -9

Which of the following set of numbers shows a pattern

• {2, -2, -2, 2, 2}

• {11, 9, 7, 5, 3}

• {4, 8, 16, 24}

• {1, 1, 2, 4, 6}

What do you call the set of numbers or objects that follow a certain pattern?

Which of the following set of numbers is an example of a sequence?

• {1, 2, 3, 4, 5}

• 1, 4, 9, 16, 27}

• {2, 4, 8, 16, 31}

• {1, 1, 2, 4, 6}

What sequence is {2, 4, 8, 16, 32}?