### Home > CCA2 > Chapter 2 > Lesson 2.2.2 > Problem2-120

2-120.

Is −578 a term in the sequence defined by $t(n)=−5n+7$? Justify your answer. Homework Help ✎

Substitute −578 for t(n).

$−5n+7=−578$

Isolate the variable to solve for n. Is n a positive integer?