Subject: Successive term?
Name: David Grimmer
Question: 20__ __ 28 __ __ Hi David,Suppose that the sequence starts 20 x y 28 then you know two facts,
From the second of these 28 = (20 + x + y)/3 so 84 = 20 + x + y and hence x + y = 64. Thus y = 64  x. Now the first fact can be stated, 64  x is the average of 20 and x. Can you finish it? Penny
