Find the Right Part of the Equality $$4 + 5 + 6 + \cdots + ( n + 3 ) =$$

question 11

Multiple Choice

Find the right part of the equality. $$4 + 5 + 6 + \cdots + ( n + 3 ) =$$

• A) \(\frac { n ( 8 n + 7 ) } { 3 }\)
• B) \(\frac { n ( n + 7 ) } { 2 }\)
• C) \(\frac { n ( 5 n + 7 ) } { 3 }\)
• D) \(n ( 5 n - 1 )\)
• E) \(\frac { n ( n + 7 ) } { n }\)

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