Question

Find an equation for the nth term of the arithmetic sequence. -17, -14, -11, -8, ...

Answer 1

3n - 20

Explanation:

a = -17

d = -14 - (-17) = 3

nth term = -17 + (n-1)(3)

= -17 + 3n - 3

= 3n - 20

Answer 2

Explanation:

a= -17

d= -14-(-17)

= -14+17

= 3

the equation of nth term =a+(n-1)d

= -17+(n-1)3

= -17+3n-3

= 3n-20