Find the sum,m, $\mathrm { s } _ { \mathbf { n } },$ , o f the sequence.
-Find the sum of the first 90 positive even integers.
A)8190
B)8095
C)8194
D)8099

Question

Quizplus · Accepted Answer

The sum of the first $n$ positive even integers can be found using the formula $S_n = n(n + 1)$. For the first 90 positive even integers, $n = 90$, so $S_n = 90(90 + 1) = 90 \times 91 = 8190$.

Find the Sum,m sn,\mathrm { s } _ { \mathbf { n } },sn​,

Find the Sum,m $\mathrm { s } _ { \mathbf { n } },$