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chứng minh

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#1
Haoblythe

Haoblythe

    Binh nhì

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cho hàm số $f\left ( x \right )= x^{2}+6x+c \left (c\epsilon N \right ) . chứng minh f\left ( 0 \right )+f\left ( 1 \right ) là một sô lẻ






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