if a+b+c=3,abc=-12 and ab+bc+ca=-4, find a3+b3+c3
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if a+b+c=3,abc=-12 and ab+bc+ca=-4, find a3+b3+c3(question)
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given a+b+c = 6 , ab + bc + ca = 11
given a+b+c = 6 , ab + bc + ca = 11 ( a + b + c )² = a² + b² + c² + 2 (ab + bc + ca)
given a+b+c = 6 , ab + bc + ca = 11 ( a + b + c )² = a² + b² + c² + 2 (ab + bc + ca) ⇒ (6)² = a² + b² + c² + 2(11) ⇒ a² + b² + c² = 36-22 = 14
given a+b+c = 6 , ab + bc + ca = 11 ( a + b + c )² = a² + b² + c² + 2 (ab + bc + ca) ⇒ (6)² = a² + b² + c² + 2(11) ⇒ a² + b² + c² = 36-22 = 14 now a³ + b³ + c³ -3abc= ( a + b + c) (a² + b² + c² - ab - bc - ca )
given a+b+c = 6 , ab + bc + ca = 11 ( a + b + c )² = a² + b² + c² + 2 (ab + bc + ca) ⇒ (6)² = a² + b² + c² + 2(11) ⇒ a² + b² + c² = 36-22 = 14 now a³ + b³ + c³ -3abc= ( a + b + c) (a² + b² + c² - ab - bc - ca ) ⇒ (6)(14 - 11) = 6. 3 = 18
given a+b+c = 6 , ab + bc + ca = 11 ( a + b + c )² = a² + b² + c² + 2 (ab + bc + ca) ⇒ (6)² = a² + b² + c² + 2(11) ⇒ a² + b² + c² = 36-22 = 14 now a³ + b³ + c³ -3abc= ( a + b + c) (a² + b² + c² - ab - bc - ca ) ⇒ (6)(14 - 11) = 6. 3 = 18hope u'll get my ans............doubts, ask?
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