If a − b = 11/5 and ab = 3/4, then one of the values of (a + b) is :यदि a − b = 11/5 और ab = 3/4 हैं, तो (a + b) का एक मान है :
यदि a − b = 11/5 और ab = 3/4 हैं, तो (a + b) का एक मान है :
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Correct answer: (B) 2 4/52 4/5
Explanation
(a + b)² = (a − b)² + 4ab = 121/25 + 3 = 196/25, so a + b = ±14/5; one value is 14/5 = 2 4/5.(a + b)² = (a − b)² + 4ab = 121/25 + 3 = 196/25, इसलिए a + b = ±14/5; एक मान 14/5 = 2 4/5 है।