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```				    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
```

7 years ago

Share

```										Hi pallavi,
{(a+b)+(c+d)}/2 ≥√{(a+b)(c+d)     since A.M>G.M
2/2 ≥ √M
√M ≤ 1
0≤ M ≤ 1

```
7 years ago

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