[" 7.If a be are in AP; "x" is the GM between a and b,y is the G.Y between "b" and "6" ."],[" then show that "b^(2)" is the AM between "x^(2)" and "y^(2)" ? "],[" 8.Show that the product of "n" geometric means between "a" and "b" is equal to the "],[" anth power of the single GM between "a" and "b" ."],[" A.It AM and GM of the roots of a quadratic equation are "10" and "8" respectively "],[" then obtain the quadratic equation."]