Question

I don’t understand problems 5-7, Given 1st term and common difference of each arithmetic sequence, solve each problem

Answer 1

Answer: 5.an=2+11n 6.an=40-10n 7.-50+5n

Explanation:

You're trying to find formulas for which when you plug in the number of the term into n, you get the value of the term. The general formula is
an=a1+(n-1)d.
All the values are already given to you so you can just substitute and simplify to get the specific formula.