Question
Download Solution PDFयदि a + b + c = 0 है और ab + bc + ca = -11 है, तब a2 + b2 + c2 का मान कितना है?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
a + b + c = 0 और ab + bc + ca = -11
प्रयुक्त सूत्र:
(a + b + c)2 = a2 + b2 + c2 + 2 (ab + bc + ca)
गणना:
प्रयुक्त सूत्र के अनुसार,
⇒ (0)2 = a2 + b2 + c2 + 2 × (-11)
⇒ 0 = a2 + b2 + c2 - 22
⇒ a2 + b2 + c2 = 22
∴ विकल्प 2 सही उत्तर है।
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