HA2 2021 S1 T1 1-3

What is the distance from one number to the next in a sequence of numbers that is represented by a (d) in an arithmetic sequence?

• Common denominator
• Common opposites
• Common domain
• Common difference

What are the next 3 terms in this sequence of terms? 3, 7, 11, 15

• 18, 22, 26
• 19, 21, 23
• 19, 23, 27
• 18, 21, 24

Which arithmetic sequence best follows the sequence
-5, -3, -1, 1, 3, 5...

• 2 -5(n-1)
• -5 +2(n-1)
• -5(2)^n-1
• 2(-5)^n-1

Which sequence is represented by the equation 2(7)^n-1 ?

• 7, 14, 28, 56...
• 2, 14, 98, 686...
• 2, 9, 16, 23...
• 7,9,11,13...

What sequence follows the formula  a_n =4n+11

• 4, 15, 26, 37...
• 15, 19, 23, 27...
• 15, 26, 37, 48...
• 11,15, 19, 23...

Which recursive formula best describes the following sequence:
3, 8, 13, 18, 23...

• a_n = (3)^n-1 ; a₁ =5
• a_n = (5)^n-1 ; a₁ =3
• a_n = a_n-1+3 ; a₁ =5
• a_n = a_n-1+5 ; a₁ =3

Which sequence best follows the formula
a_n= a_n-1 + 9;  a₁= -99

• -99, -108, -117, -126...
• -99, -90, -81, - 72...
• 9, -90, - 189, -288
• 9,-90, 189, -288

Given a_n = 3 + (n-1)(-9),
What is the common difference?

• -1
• 3
• -9
• 9

Create the explicit formula for the sequence:
2, 8, 14, ...
(Hint:  Write your formula and then simplify it.)

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

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