Arithmetic Geometric MAKE UP

Given 3, 4, 5, 6, ... determine if this is an arithmetic sequence

• yes

• no

Given -3, -8, -13, -18... determine what the next 3 terms would be

• -13, -8, -3

• 23, 28, 33

• -23, -28, -33

• none of these

What is the formula for the nth term given: 9, 11, 13,...

• $t_n=9\ +\ 2\left(n\ -\ 1\right)$

• $t_{n\ }=\ 9\ +\ 2^{\left(n-1\right)}$

• $t_{n\ }=\ 9\ -\ 2\left(n-1\right)$

• $t_{n\ }=\ 9\ +\ 2\left(n\ +1\right)$

Given 12, 9, 6 write the formula for  $t_n$  

•  $t_{n\ }=\ 12\ -\ 3\left(n+1\right)$  

•  $t_{n\ }=\ 12\ +\ 3\left(n\ +\ 1\right)$  

•  $t_{n\ }=\ 12\ -\ 3\left(n-1\right)$  

•  $t_{n\ }=\ 12\ +\ 3\left(n-1\right)$  

What would be the t_n = for { 3/4, 7/4, 11/4, 15/4}

• t_n = 1 + (3/4)(n - 1)

• t_n = 1 + ( 3/4)(n + 1)

• t_n = (3/4) + (n + 1)

• t_n = (3/4) + (n-1)

Which of the following is the t_n = for the sequence: 242, 226, 210, 194...

• Not arithmetic, therefore cannot give formula

• t_n = 242 + 16(n-1)

• t_n = 242 - 16(n-1)

• t_n = 258 - 16n

What would be the 60th term for this sequence: 6, 10, 14, 18...

• Not arithmetic so I can not give t₆₀

• Not arithmetic but I can give the t₆₀ =242

• Arithmetic and t₆₀=242

Is this an arithmetic sequence? 200, 100, 50, 25...

• Yes, d=1/2

• No, no common difference

• Yes, d=2

• Yes, d=divide by 2

What is the common difference when t₆ = -27 and t₇ = -31

• 4

• -6

• 1

• -4

Which is the common difference for: 5, 8, 12, 15...

• 3

• -3

• 4

• No common difference