F(x)=\frac{(x 18)(x 72)(x 98)(x K)}{x}

请输入您的数学问题…… f(x)=\frac{(x-18)(x-72)(x-98)(x-k)}{x}

问题

f (x) = \frac{( x - 18 ) ( x - 72 ) ( x - 98 ) ( x - k )}{x}

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