### Home > GB8I > Chapter 11 Unit 12 > Lesson INT1: 11.2.3 > Problem11-83

11-83.

Write an equation for each sequence.

1.  $n$ $t(n)$ $1$ $7$ $2$ $4$ $3$ $1$

Review the Math Notes box in section 2.2.2 and section 5.3.3.

1.  Year Cost $2$ $2000$ $3$ $6000$ $4$ $18000$

Do these points match an Arithmetic sequence or Geometric sequence?