Question

Find the sum of the first 7 terms of the following sequence 3,-5,25/3 Round to the nearest hundredth if necessary.

Answer 1

This is a geometric sequence with first term 3 and a common ratio of -5/3.

Using the sum of a geometric series formula,

`(3(1-(-5/3)^(7))/(1-(-5/3)) \approx \boxed{41.31}`