用定以证明lim(n趋向于无穷)(n^2+1)/(1-2n)=负无穷实在做不来高数这种证明题.定义是:任意M>0,存在N属于Z+,任意n>N,Xn
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![用定以证明lim(n趋向于无穷)(n^2+1)/(1-2n)=负无穷实在做不来高数这种证明题.定义是:任意M>0,存在N属于Z+,任意n>N,Xn](/uploads/image/z/2689469-53-9.jpg?t=%E7%94%A8%E5%AE%9A%E4%BB%A5%E8%AF%81%E6%98%8Elim%EF%BC%88n%E8%B6%8B%E5%90%91%E4%BA%8E%E6%97%A0%E7%A9%B7%EF%BC%89%28n%5E2%2B1%29%2F%281-2n%29%3D%E8%B4%9F%E6%97%A0%E7%A9%B7%E5%AE%9E%E5%9C%A8%E5%81%9A%E4%B8%8D%E6%9D%A5%E9%AB%98%E6%95%B0%E8%BF%99%E7%A7%8D%E8%AF%81%E6%98%8E%E9%A2%98.%E5%AE%9A%E4%B9%89%E6%98%AF%EF%BC%9A%E4%BB%BB%E6%84%8FM%3E0%2C%E5%AD%98%E5%9C%A8N%E5%B1%9E%E4%BA%8EZ%2B%2C%E4%BB%BB%E6%84%8Fn%3EN%2CXn)
用定以证明lim(n趋向于无穷)(n^2+1)/(1-2n)=负无穷实在做不来高数这种证明题.定义是:任意M>0,存在N属于Z+,任意n>N,Xn
用定以证明lim(n趋向于无穷)(n^2+1)/(1-2n)=负无穷
实在做不来高数这种证明题.定义是:任意M>0,存在N属于Z+,任意n>N,Xn
用定以证明lim(n趋向于无穷)(n^2+1)/(1-2n)=负无穷实在做不来高数这种证明题.定义是:任意M>0,存在N属于Z+,任意n>N,Xn
lim (n^2+1)/(1-2n)=-∞
考虑
(n^2+1)/(1-2n)
注意到n≥1,故
N,都有(n^2+1)/(1-2n)
用定以证明lim(n趋向于无穷)(n^2+1)/(1-2n)=负无穷实在做不来高数这种证明题.定义是:任意M>0,存在N属于Z+,任意n>N,Xn
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