Lustration : Lim ((x+a)(x+b)(x+c)}/...
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Lustration : Lim ((x+a)(x+b)(x+c)}/3 - x

JEE/Engineering Exams
Maths
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Using binomial approxination [ begin{array}{l} =xleft(1+frac{1}{3}left(frac{(a+b+c)(a b+b c+c a+a b c)}{x^{2}}right)-xright. =lim _{n rightarrow infty}left(frac{1}{3}(a+b+c)+a b+b c+c a+a b cright) =frac{a+b+c}{3} end{array} ]
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