Write the word or phrase that best completes each statement or answers the question. Use mathematical induction to prove that the statement is true for every positive integer n.
-$$1 + 4 + 7 + \ldots + ( 3 n - 2 ) = \frac { n ( 3 n - 1 ) } { 2 }$$

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The Answer of Write the word or phrase that best completes each statement or answers the question. Use mathematical induction to prove that the statement is true for every positive integer n.
-$$1 + 4 + 7 + \ldots + ( 3 n - 2 ) = \frac { n ( 3 n - 1 ) } { 2 }$$

Write the Word or Phrase That Best Completes Each Statement 1+4+7+…+(3n−2)=n(3n−1)21 + 4 + 7 + \ldots + ( 3 n - 2 ) = \frac { n ( 3 n - 1 ) } { 2 }1+4+7+…+(3n−2)=2n(3n−1)​

Write the Word or Phrase That Best Completes Each Statement $1 + 4 + 7 + \ldots + ( 3 n - 2 ) = \frac { n ( 3 n - 1 ) } { 2 }$