If a,b,c,d are positive real number with `a + b + c + d=2` ,then `M =(a+b)(c+d)` satisfies the inequality

If a,b,c,d,e are five positive numbers, then

If a,b,c,d are positive real umbers such that a+b+c+d=2, then M=(a+b)(c+d) satisfies the relation (a)0<=M<=1(b)1<=M<=2(c)2<=M<=3(d)3<=M<=4

If a,b,c,d are four positive real numbers such that abcd=1 then least value of (a+4)(b+4)(c+4)(d+4) is

Let a,b,c , d ar positive real number such that a/b ne c/d, then the roots of the equation: (a^(2) +b^(2)) x ^(2) +2x (ac+ bd) + (c^(2) +d^(2))=0 are :

If a, b, c, d, e are positive real numbers, such that a + b +c + d + e = 8 and a^2 + b^2 + c^2 + d^2 + e^2 = 16 , find the range of e.

If a,b,c,d are positive real numbers such that (a)/(3) = (a+b)/(4)= (a+b+c)/(5) = (a+b+c+d)/(6) , then (a)/(b+2c+3d) is:-

If a, b, c and d are positive real numbers such that a+b+c+d= 1 then prove that ab + bc + cd + da le 1/4 .

If a, b, c and d are four positive real numbers such that sum of a, b and c is even the sum of b,c and d is odd, then a^2-d^2 is necessarily

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