Question
Download Solution PDFयदि a + b = 5 और a - b = \(\sqrt{17}\) है, तो ab = ________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
a + b = 5
a - b = √17
प्रयुक्त सूत्र:
(a + b)2 - (a - b)2 = 4ab
गणना:
(5)2 - (√17)2 = 4ab
⇒ 25 - 17 = 4ab
⇒ 8 = 4ab
⇒ ab = 2
∴ सही उत्तर विकल्प (1) है।
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