Precalculus Test Lessons 7.1 - 7.3

Find the three terms in the sequence after the last one given...

-13, 87, 187, 287, ...

• 488, 588, 688

• 387, 487, 587

• 487, 587, 687

• 391, 492, 593

Find the rule or formula:

-15, -6, 3, 12, ...

• a_n = -15 + 9n

• a_n = -24 + 9n

• a_n = -7 + 9n

• a_n = -6 + 9n

-20, -24, -28, -32, ...

Find a₂₄

• -116

• -120

• -118

• -112

Evaluate the arithmetic series described. (Find the sum):

a₁ = 14, a_n = 54, n = 11

• 748

• 374

• 1504

• 752

• 2450

• 4888

• 2444

• 4900

• 1

• 2

What is the 15th term in the arithmetic sequence 30, 27, 24, …?

• 72

• -9

• -12

• 69

• 14

• 2

• 7

• -97

• 102

• -96

• 103

The arithmetic mean between 12 and 16 is _____.

• 2

• 4

• 14

• 28