The difference between any two consecutive terms of an A.P. is ….

What is the common difference between the consecutive terms of an A.P.

The ratio between any two consecutive terms of the G.P. is …… and it is called ……

If the sum of the roots of the quadratic equation ax^2+bx+c=0 is equal to the sum of the squares of their reciprocals, show that bc^2,ca^2,ab^2 are in Arithmetic Progression (AP). It is well known that if any three consecutive terms, form a sequence, are such ttiat the difference between any two consecutive terms is same' then they are in AP.

For what value of p, the following terms are three consecutive terms of an A.P. 4/5 , p,2.