Question

Find the 15th term of the arithmetic sequence.
2, 3.5, 5, 6.5, ...

Answer 1

an=a1+d(n-1)
a1=first term
d=common difference
n=which term


adds 1.5 each time
first term is 2
we want to find 15h term

a15=2+1.5(15-1)
a15=2+1.5(14)
a15=2+21
a15=23

the 15th term is 23