Arithmetic Sequence Wrap Up

Is the following sequence arithmetic?
21, 13, 5, -3, ...

• YES
• NO

Is the following sequence arithmetic?
1, 4, 9, 16, ...

• YES
• NO

Determine the common difference for the arithmetic sequence
-5, 12, 29, 46, ...

• 7
• 17
• -7
• -17

Determine the common difference for the arithmetic sequence
9, 16, 23, 30, ...

• 7
• 17
• -7
• -17

Given the recursive formula, find the first four terms:
a_n = a_n-1 + 5
a₁ = -16

• -16, -21, -26, -31
• 5, -11, -27, -43
• -16, -80, -500, -200
• -16, -11, -6, -1

Write the explicit rule for the arithmetic sequence

12, 10, 8, 6, ...

• $a_n=12+2\left(n-1\right)$
  

• $a_n=-2\left(n-1\right)$

• $a_n=12-2\left(n-1\right)$
  

• $a_n=a_{n-1}+12$
  

Find the first term of the given sequence:
a₁₄=68
d=3

• 14
• 20
• 26
• 29

Given the sequence:

25, 21, 17, 13,...

Write the explicit equation that models the sequence.

• $a_n=25+4\left(n-1\right)$
  

• $a_n=a_{n-1}-4;\ \ \ a_1=25$
  

• $a_n=25-4\left(n-1\right)$

• $a_n=13+4\left(n-1\right)$