Find the A.M. between: `(x-y)a n d\ (x+y)`

Find the A.M. between: (x+y)^(2) and (x-y)^(2)

Find the A.M. between: 12\ a n d-8

A(x_1, y_1) and B(x_2, y_2) are any two points on the parabola y=cx^2 + bx + a . If P(x_3, y_3) be the point on the arc AB where the tangent is parallel to the chord AB , then (A) x_2 is the A.M. between x_1 and x_3 (B) x_2 is the G.M. between x_1 and x_3 (C) x_2 is the H.M. between x_1 and x_3 (D) none of these

If x,y,z be three numbers in G.P. such that 4 is the A.M. between x and y and 9 is the H.M. between y and z , then y is

Find the distance between P(x_1,\ y_1)a n d\ Q(x_2, y_2) when i. P Q is parallel to the y-axis ii. PQ is parallel to the x-axis.

If (a^n+b^n)/(a^(n-1)+b^(n-1)) is the A.M. between a and b, then find the value of n.

If (a^n+b^n)/(a^(n-1)+b^(n-1)) is the A.M. between a and b, then find the value of n.

If (a^(n+1)+b^(n+1))/(a^n+b^n) is the A.M. between a and b . Then, find the value of n

If a,b,c in G.P. x,y be the A.M.\'s between a,b and b,c respectively then (a/x+c/y)(b/x+b/y)= (A) 2 (B) -4 (C) 4 (D) none of these

Find the angle between the lines x=a\ a n d\ b y+c=0.