PascalsRuleForanypositiveintegersnandk n1k nk nk1Analgebraicproof nk nk1n knkn k1nk1nk1nkn knk1nnk1k kn1kn1 kn1k n1kQED ID: 393235
Pascal'sRuleForanypositiveintegersnandk n+1k!= nk!+