Solve the problem.
-The sum, $S$, of the first $n$ positive integers is given by the following formula: $S=\frac{n(n+1)}{2}$. What is the sum of the first 27 positive integers?
A) 378
B) 14
C) 28
D) 189

Question

Quizplus · Accepted Answer

Using the formula $S=\frac{n(n+1)}{2}$, with $n=27$, we get $S=\frac{27(27+1)}{2} = \frac{27 \times 28}{2} = 378$.

Solve the Problem SSS , of the First nnn Positive Integers Is Given by the Following Formula

Solve the Problem $S$ , of the First $n$ Positive Integers Is Given by the Following Formula