If a,b, c, d are positive real numbers 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

pallavi pradeep bhardwaj , 16 Years ago

Grade 12