How Many Terms Are In An Arithmetic Sequence Whose First Term Is -3, Common Difference Is 2, And Last Term Is 23?

how many terms are in an arithmetic sequence whose first term is -3, common difference is 2, and last term is 23?

 

Answer:

a1= -3

d=2

an=23

n=?

an=a1+(n-1)d

23= -3+(n-1)(2)

23= -3+2n-2

23= -5+2n

23+5=2n

28/2=2n/2

14=n

Step-by-step explanation: