Find the sum.
-$$\sum _ { i = 1 } ^ { 4 } ( 5 i + 1 )$$

Name: Find the sum. -\[\sum _ { i = 1 } ^ { 4 } ( 5 i + 1 )\]
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Question

Quizplus · Accepted Answer

The sum can be calculated by substituting the values of $i$ from 1 to 4 into the given formula $5i + 1$ and adding the results: $$ \begin{align*} \sum _ { i = 1 } ^ { 4 } ( 5 i + 1 ) &= (5 \cdot 1 + 1) + (5 \cdot 2 + 1) + (5 \cdot 3 + 1) + (5 \cdot 4 + 1) \ &= 6 + 11 + 16 + 21 \ &= 54. \end{align*} $$

Find the Sum ∑i=14(5i+1)\sum _ { i = 1 } ^ { 4 } ( 5 i + 1 )i=1∑4​(5i+1)

Find the Sum $\sum _ { i = 1 } ^ { 4 } ( 5 i + 1 )$