Hello,

Consider a geometric sequence with t3= 18 and t7= 1458. Are there one or two values for the common ratio? How does this affect the sequence

(I got one, but the way this question mentions 2 ratios, I get the feeling there are 2 values.)

My work:

1458 = 18r^4
81 = r^4
3 = r

2 answers

r = ±3

Thanks.