Question

Find the 8th term of the arithmetic sequence:
-3.2, -3.4, -3.6, -3.8, ...

Answer 1

first step: find the common difference to do that...subtract the first term from the second term

\[\implies -3.4 - (-3.2) \implies -3.4 + 3.2 \implies 0.2\]
therefore common difference is 0.2

now use the formula
\[a_n = a_1 + (n-1)d\]
since you're looking for 8th term there would be 8 terms make sense?
\[a_8 = -3.2 + (8-1)(0.2)\]
can you solve it further now?

Answer 2

or do you need more help?