Question

What’s the correct answer

Answer 1

$a_n=a_{n-1}+7 \ \ \to \ \ d=7 \\ \\ a_n=a_1+d(n-1) \\ a_n=17+7(n-1) \\ a_n=17+7n-7 \\ a_n=7n+10$

The answer is B. a_n = 7n+10