Answer:
The sum of the sequence is 40.
Explanation:
The given sequence is an arithmetic sequence with a common difference of 3. To find the value of n for the number 14 in the sequence, we can use the explicit formula for an arithmetic sequence:
a_n = a_1 + (n-1)d
where a_n is the nth term of the sequence, a_1 is the first term, d is the common difference, and n is the term number.
Substituting the given values, we get:
14 = 2 + (n-1)3
Simplifying the equation, we get:
12 = 3n - 3
15 = 3n
n = 5
Therefore, the number 14 appears as the 5th term in the sequence.
To find the sum of the sequence, we can use the arithmetic sum formula:
S_n = (n/2)(a_1 + a_n)
where S_n is the sum of the first n terms of the sequence.
Substituting the given values, we get:
S_5 = (5/2)(2 + 14)
S_5 = 40
Therefore, the sum of the sequence is 40.