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Defining \(0^0 = 1\) is necessary for many polynomial identities. For example, the binomial theorem \((1 + x)^n\) is not valid for x = 0 unless \(0^0 = 1\).

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\(f(a+h)=\sum_{k=0}^{\infty} f^{(k)}(a)h^k\)£¬ÆäÖÐ\(f^{(k)}\)´ú±í¸ú¯ÊýµÄk ½׵¼Êý¡£

Graham, Ronald; Knuth, Donald; Patashnik, Oren (1989-01-05). "Binomial coefficients". Concrete Mathematics (1st ed.). Addison-Wesley Longman Publishing Co. p. 162. ISBN 0-201-14236-8

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