If a, b and c are distinct positive numbers, then the expression `(a + b - c)(b+ c- a)(c+ a -b)- abc` is:

If a,b,c are distinct positive real numbers, then

If a, b, c, d are distinct positive numbers in A.P., then:

If a, b, c be distinct positive real numbers then the value of |[a, b, c], [b, c, a], [c, a, b]| is

If a,b,c,d are four distinct positive numbers in G.P.then show that a+d>b+c.

If a, b, c are the distinct positive numbers than (a+b+c)(ab+bc+ac) is :

If a, b and c are distinct positive real numbers and a^2 + b^2 + c^2 = 1, then ab + bc + ca is

If a, b and c are distinct positive real numbers such that Delta_(1) = |(a,b,c),(b,c,a),(c,a,b)| and Delta_(2) = |(bc - a^2, ac -b^2, ab - c^2),(ac - b^2, ab - c^2, bc -a^2),(ab -c^2, bc - a^2, ac - b^2)| , then