Question

Find the next term in this arithmetic sequence: -3, -5, -7

Answer 1

-9 ?

Answer 2

If you want to express it in calculations,
\[a_1=-3~~,~~d=-5-(-3)=-2\]
\[T_4=a_{1}+(n-1)d\]
\[T_4=-3+(3)(-2)=-9\]