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[" 1."4sqrt(9)quad f(x)={[(x-1)/(2x^(2)-...

[" 1."4sqrt(9)quad f(x)={[(x-1)/(2x^(2)-7x+5),," Jid "x!=1],[-(1)/(3),,root(3)(9)x=1]],[" root(7)( fors ) "(1)/(" anffort ")" for "f'(1)=-(2)/(9)]

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