Use the Principle of Mathematical Induction to show that the statement is true for all natural numbers n.
-$$7 + 14 + 21 + \ldots + 7 n = \frac { 7 n ( n + 1 ) } { 2 }$$

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The Answer of Use the Principle of Mathematical Induction to show that the statement is true for all natural numbers n.
-$$7 + 14 + 21 + \ldots + 7 n = \frac { 7 n ( n + 1 ) } { 2 }$$

Use the Principle of Mathematical Induction to Show That the Statement