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    鮭鮪茶泡飯

    來愉快的解數學吧!

    ☆quiet follow Yell with Emoji 💖 👍 🎉 😍
    POIPOI 3

    鮭鮪茶泡飯

    ☆quiet follow

    楚興牧if END

    F(x)=x^4-2x^2+1
    lim x->2
    Password:求lim[f(x)-f(2)]/x-2

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