Formulas of Arithmetic Sequences

Find the explicit formula:
-3, -33, -63, -93, ...

• a_n = -3 - 30(n -1)
• a_n = -3 + 30(n -1)
• a_n = -30 - 3(n -1)
• a_n = -30 + 3(n -1)

Find the explicit formula:
-23, -16, -9, -2, ...

• a_n = -23 + 7(n -1)
• a_n = -23 - 7(n -1)
• a_n = 7 - 23(n -1)
• a_n = 7 + 23(n -1)

Find the term named in the problem
-9, -14, -19, -24, ... a₂₉

• -149
• -184
• -205
• -212

Find the term named in the problem
14, 22, 30, 38, ... a₂₂

• 190
• 182
• 169
• 127

Find the term named in the problem
14, 214, 414, 614, ... a₃₀

• 5724
• 5814
• 5784
• 5614

Create the formula for the arithmetic sequence:
-10, -3, 4, 11...

• a_n = 17-7n
• a_n = -17+7n
• a_n= -17-7n
• a_n = 17+7n

Create the formula for the arithmetic sequence:
2, 8, 14, ...

• a_n = 2+6n
• a_n = -6+6n
• a_n= -4+6n
• a_n = 4-6n

Create the formula for the arithmetic sequence:
18, 20, 22, 24...

• a_n = 16+2n
• a_n = -16+2n
• a_n= 2-16n
• a_n = 2+16n

Given the arithmetic sequence
a_n = 12 + (n-1)3 
which equation is equivalent

• a_n = 3n-12
• a_n = 3n+9
• a_n = 3n +12
• a_n = 3 + 12(n-1) 

Given the arithmetic sequence
a_n = 14 + (n-1)9 
which equation is equivalent

• a_n = 9n-5
• a_n = 9n+5
• a_n = 5n +9
• a_n = 9 + 14(n-1)