Question

Find the indicated term of each arithmetic sequence. 9. an= 16 + (n -1) (-0.5) Find term 15th 10. an = 6 + (n -1) (3) Find term 32th term 11. -8, -6, -4, -2, ...Find term 100th

Answer 1

9.- an = 16 + (n - 1)(-0.5)

n = 15

an = 16 + (16 - 1)(-0.5)

= 16 + 15(-0.5)

= 16 - 7.5

= 8.5

10.- an = 6 + (n - 1)(3)

n = 32

an = 6 + (32 - 1)(3)

an = 6 + (31)(3)

an = 6 + 93

an = 99

11.- -8, -6, -4, -2,

n = 100

Sequence an = -8 - (n + 1)

an = -8 - (100 + 1)

an = -8 - 101

an = -109