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A+b+c=10,a²+b²+c²=22 हो तो ab+bc+ca का मान क्या होगा |
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Answer» GIVEN :- a + b + C = 10 a² + b² + c² = 22 Now, (a + b + c)² = a² + b² + c² + 2(ab + bc + ca) (10)² = 22 + 2(ab + bc + ca) 100 - 22 = 2(ab + bc + ca) ab + bc + ca = 39 ANSWER.... |
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