2nd 9 Weeks Exam Review AP PreCalc

What is the explicit formula for the arithmetic sequence 3, 11, 19, ...

Given an arithmetic sequence where the 22nd term is -15 and the common difference is 6, find the first term of the sequence.

• -15

• -141

• 6

• not enough information is given

The number of seats in a section of an arena form an arithmetic sequence. Row one has 14 seats and row 2 has 16 seats. How many seats are in row 30?

The 4th term of an arithmetic sequence is 7 and the 6th term is -3. What is the common difference?

Write the explicit formula for the geometric sequence.

• a_n = 4(3)^n-1
• a_n = 3(4)^n-1
• a_n = -4(3)^n-1
• a_n = 3(-4)^n-1

Given the sequence:

125, 25, 5, ....

Write the rule a_n using the geometric sequence formula:

• a_n = (125)(1/5)^(n-1)

• a_n = 625(1/5)^(n-1)

• a_n = 625(5)^(n-1)

• a_n = 125 + 5n

A geometric sequence has a common ration(r) of 3 and the 8th term (a₈) is 13,122. What is the first term of the sequence (a₁)?

• 3

• 6

• 18

• 2

• g(x) is shifted 4 units up

• g(x) is shifted 4 units to the left

• g(x) is shifted 4 units to the right

• g(x) is shifted 4 units down

• D: undefined and R: undefined