Final answer:
To find the sum of the arithmetic sequence, plug the given values into the formulas for the nth term and sum of an arithmetic sequence. The sum of the arithmetic sequence is 719.
Step-by-step explanation:
To find the sum of the arithmetic sequence, we can use the formula for the sum of an arithmetic series:
S = (n/2)(2a + (n-1)d)
where S is the sum, n is the number of terms, a is the first term, and d is the common difference.
In this case, the first term (a) is 719 and the common difference (d) is 3. To find the number of terms (n), we can plug the values into the formula for the nth term of an arithmetic sequence:
un = a + (n-1)d
Plugging in the values, we get:
719 = 719 + (n-1)3
0 = (n-1)3
n-1 = 0
n = 1
Since we have n = 1, the sum of the arithmetic sequence is simply the first term, which is 719.
Therefore, ∑ i=719 ui = 719.