Question

A
Write an explicit formula for an, the nth term of
the sequence 17, 15, 13, ...

Answer 1

Tn=-2n+19

Explanation:

Well in south africa we use Tn

Tn=a+(n-1)d

a=is the first term in the sequence which is 17

d=is the the difference between the terms which is - 2

Tn=17+(n-1)(-2)

Tn=17-2n+2

Tn=-2n+19