Write the sum using summation notation.
-$$30 + 42 + 54 + 66 + 78$$
A) $\sum _ { i = 1 } ^ { 6 } ( 12 \mathrm { i } + 18 )$

B) $\sum _ { i = 1 } ^ { 5 } ( 12 n + 18 )$

C) $\sum _ { i = 0 } ^ { 5 } ( 12 i + 18 )$

D) $\sum _ { \mathrm { i } = 1 } ^ { 5 } ( 12 \mathrm { i } + 18 )$

Question

Write the sum using summation notation.
-$$30 + 42 + 54 + 66 + 78$$
A) $\sum _ { i = 1 } ^ { 6 } ( 12 \mathrm { i } + 18 )$

B) $\sum _ { i = 1 } ^ { 5 } ( 12 n + 18 )$

C) $\sum _ { i = 0 } ^ { 5 } ( 12 i + 18 )$

D) $\sum _ { \mathrm { i } = 1 } ^ { 5 } ( 12 \mathrm { i } + 18 )$

Quizplus · Accepted Answer

The sequence can be represented by the formula $12i + 18$, where $i$ starts at 1 and goes to 5, because when $i=1$, the formula gives $12(1) + 18 = 30$, and for $i=5$, it gives $12(5) + 18 = 78$, matching the sequence exactly.

Write the Sum Using Summation Notation 30+42+54+66+7830 + 42 + 54 + 66 + 7830+42+54+66+78

Write the Sum Using Summation Notation $30 + 42 + 54 + 66 + 78$