If p and r are positive real numbers, then the quantity (p+r)/(q+r) is

If p,q,r are any real number, then

If p, q, r are real numbers then:

If p,q,r be three distinct real numbers, then the value of (p+q)(q+r)(r+p), is

If p,q,r be three distinct real numbers, then the value of (p+q)(q+r)(r+p), is

Let a, b , c, p , q , r be positive real numbers such that a , b , c are in G.P. and a^p = b^q = c^r . Then

If p,q,r , three positive real numbers are in A.P., then the roots of px^(2) + qx + r = 0 are all real for :