Question

4. Write an explicit formula for the sequence 6,2, -2, -6, -10.... Then find the 12th term

Answer 1

-38

Explanation:

general formula

a + (n-1)(d)

formula for this question

6 + (n-1)(-4)

find d

2-6=-2-2

-4=-4

d=-4

a=6 d=-4

12th term

T12= 6+(12-1)(-4)

= 6 + (-44)

=-38

hope this helps :)