Question

What is the common ratio for 400,-200,100,-50

Answer 1

Answer:

r = -1/2

Step-by-step explanation:

To find r, divide any number in the set by the previous number in the set and reduce the fraction if possible.  Check multiple numbers to make sure r is consistent between all entries...

-200/400 = -1/2

100/-200 = -1/2

-50/100 = -1/2

So r = -1/2