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[" 128.If "alpha,beta" are roots of the ...

[" 128.If "alpha,beta" are roots of the equation "ax^(2)+bx+c=0" ,"],[" where "a!=0,b" ,care real numbers,then "],[lim_(x-beta)(1-cos(ax^(2)+bx+c))/((x-beta)^(2))" ,is: "]

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