IB Math AI SL & HL 1.1-1.3 Review

Find the 22nd term of the following sequence:

5, 8, 11, ...

• 14

• 63

• 68

• 71

Identify the common difference.

97, 86, 75, 64, ...

• 8

• 11

• -8

• -11

Find the 25th term of the sequence if a₁ = 5 and d = 0.5

• 14

• 15

• 17

• 18

Given the sequence:

25, 21, 17, 13,...

Write the explicit equation that models the sequence.

• a_n = 4n + 29

• a_n = - 4n + 29

• a_n = - 4n + 25

• a_n = 4n + 25

The next two terms of the sequence 4,7,10,13 are ....

• 16 and 19

• 16 and 18

• 15 and 19

• 15 and 18

Is the sequence arithmetic: 17, 9, 1, -7, ...

• True

• False

Find a₂₆ in the arithmetic sequence: -15, -35, -55, -75, ...

• -515

• -535

• -490

• 460

Find the sum of the arithmetic series described:

2 + (-2) + (-6) + (-10)..., S₁₀

• -160

• -320

• -328

• -336

The sequence 28, 34, 40, 46, 52, ..., 88 has 11 terms. Find the sum of the 11 terms.

• 550

• 610

• 638

• 288

a₁=5, a₂=11, a₁₅=?

• 81

• 89

• 95

• 159