(2011•湖南)给定k∈N*,设函数f:N*→N*满足:对于任意大于k的正整数n:f(n)=n-k2)设k=4,且当n≤4时,2≤f(n)≤3,则不同的函数f的个数为 为什么是16个而不是8个
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![(2011•湖南)给定k∈N*,设函数f:N*→N*满足:对于任意大于k的正整数n:f(n)=n-k2)设k=4,且当n≤4时,2≤f(n)≤3,则不同的函数f的个数为 为什么是16个而不是8个](/uploads/image/z/8789896-64-6.jpg?t=%EF%BC%882011%26%238226%3B%E6%B9%96%E5%8D%97%EF%BC%89%E7%BB%99%E5%AE%9Ak%E2%88%88N%2A%2C%E8%AE%BE%E5%87%BD%E6%95%B0f%EF%BC%9AN%2A%E2%86%92N%2A%E6%BB%A1%E8%B6%B3%EF%BC%9A%E5%AF%B9%E4%BA%8E%E4%BB%BB%E6%84%8F%E5%A4%A7%E4%BA%8Ek%E7%9A%84%E6%AD%A3%E6%95%B4%E6%95%B0n%EF%BC%9Af%EF%BC%88n%EF%BC%89%3Dn-k2%EF%BC%89%E8%AE%BEk%3D4%2C%E4%B8%94%E5%BD%93n%E2%89%A44%E6%97%B6%2C2%E2%89%A4f%EF%BC%88n%EF%BC%89%E2%89%A43%2C%E5%88%99%E4%B8%8D%E5%90%8C%E7%9A%84%E5%87%BD%E6%95%B0f%E7%9A%84%E4%B8%AA%E6%95%B0%E4%B8%BA+++++%E4%B8%BA%E4%BB%80%E4%B9%88%E6%98%AF16%E4%B8%AA%E8%80%8C%E4%B8%8D%E6%98%AF8%E4%B8%AA)
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