arithmetic sequence review

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

• -515

• -490

• -535

• 460

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.  (Hint:  Simplify your equation.)

• a_n = 4n + 29

• a_n = -4n + 25

• a_n = -4n + 29

• a_n = 4n + 25

Given the arithmetic sequence
a_n = 5 + (n-1)6 
which equation is equivalent

• a_n = 6n-5

• a_n = 6n-1

• a_n = 5n +6

• a_n = 6 + 5(n-1) 

Find  $a_{32}$  for the sequence.
9, 4, -1, -6, -11, ...

• 81

• -34

• -146

• -225