Find the indicated terms of the geometric sequence with the given description.

Question

The fourth term is 15 and the seventh term is 40/9

 

first term=

nth terms=

Answer 1

to get from fourth term, multiply it by r three times, advancing through 45h, 6th to 7th term.

 

15r³ = 40/9

Solve for r. 

 

First term is 4th term divided by r³