Use Mathematical Induction to Prove the Following $$\sum _ { i = 1 } ^ { n } ( 5 i + 8 ) = \frac { n ( 5 n + 21 ) } { 2 }$$

question 87

Essay

Use mathematical induction to prove the following.
- $$\sum _ { i = 1 } ^ { n } ( 5 i + 8 ) = \frac { n ( 5 n + 21 ) } { 2 }$$

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