Question

Find the 8th term of the arithmetic sequence:

10, 9 3/4,9 1/2,9 1/4

8 1/4
8 1/2
7 1/2
7 3/4

Answer 1

an = a1 + (n-1)d

a8 = 10 + (8-1)(-1/4)
a8 = 10 + 7(-1/4)
a8 = 10 + (-1.75)
a8 = 8.25 or 8 1/4