Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation.
-$$2 + 8 + 18 + \ldots + 50$$
A) $\sum _ { i = 1 } ^ { 5 } 2 i ^ { 2 }$
B) $\sum _ { i = 0 } ^ { 5 } 2 i ^ { 2 }$
C) $\sum _ { i = 1 } ^ { 5 } i ^ { 2 }$
D) $\sum _ { i = 1 } ^ { 5 } 2 ^ { 2 }$

Question

Quizplus · Accepted Answer

The given series can be expressed as $2(1^2) + 2(2^2) + 2(3^2) + \ldots$, which matches the pattern $2i^2$ starting from $i=1$. The last term, $50$, corresponds to $2(5^2)$, indicating the series ends at $i=5$. Therefore, the correct expression is $\sum _ { i = 1 } ^ { 5 } 2 i ^ { 2 }$.

Express the Sum Using Summation Notation 2+8+18+…+502 + 8 + 18 + \ldots + 502+8+18+…+50

Express the Sum Using Summation Notation $2 + 8 + 18 + \ldots + 50$