Question

find the 20th term of an arithmetic sequence with a first term of 3 and a common difference of 5. a. 87 b. 98 c. 101 d. 130

Answer 1

The formula for the nth term of an arithmetic sequence is:
$n_{th} \ term=a+(n-1)d$
where a is the first term and d is the common difference.
Plugging the given values into the formula, we get:
$20th\ term=3+(20-1)5=98$
The answer is b. 98.