Answer:
An arithmetic sequence is defined by:
Here, we know that:
Using the recursive relation, we can write:
And can keep applying the recursive relation, so we will have:
And so on, until we get to a known term:
Then we can solve:
98 = 14 + 7*d
for d:
98 - 14 = 7*d
84 = 7*d
84/7 = d = 12
Now we know the value of d, we can keep using the recursive relation to find the first 3 terms:
Here, we can rewrite the recursive relation as:
Then:
Then the first 3 terms are:
-22, -10, 2