Arithmetic Sequences--the basics only Explicit Formula

a constant number is multipled

a constant number is divided

a constant number is added to each term

there is not pattern

Yes because you are multiplying by one every time.

Yes because you are adding 1 each time.

No because it starts at 1.

No because it doesn't start at 0.

No because there is not a common difference every time.

No because it is not subtracting

Yes because you are adding 3 or 4 every time

Yes because you are adding 3 every time

-1

+1

-2

+2

+10

-10

-5

+5

$a_n=\ -5+\left(n-1\right)\left(-2\right)$

$a_n=-5+\left(n-1\right)\left(2\right)$

$a_n=\ 5+\left(n-1\right)\left(-2\right)$

$a_n=\ 5+\left(n-1\right)\left(2\right)$

 $a_n=\ -5+\left(n-1\right)\left(-15\right)$ 

 $a_n=\ -5+\left(n-1\right)\left(15\right)$ 

 $a_n=\ 15+\left(n-1\right)\left(-5\right)$ 

 $a_n=\ 15+\left(n-1\right)\left(5\right)$ 

 $a_n=2n\ +7$  

 $a_n=2n\ -7$  

 $a_n=2n\ +3$  

 $a_n=2n\ +5$  

 $a_n=-5n+20$  

 $a_n=-5n+15$  

 $a_n=-5n+10$  

 $a_n=5n+15$  

 $a_n=12n\ +100$ 

 $a_n=-12n\ +100$ 

 $a_n=12n+112\$ 

 $a_n=12n\ +\ 88$