[問題] 數學拉格朗日多項式還是不懂...
設a.b.c.為相異三實數,則下列敘述哪些正確?
(D)f(X)=a的三次方(x-b)(x-c)/(a-b)(a-c)+b的三次方(x-a)(x-c)/(b-a)(b-c)
+c的三次方(x-a)(x-b)/(c-a)(c-b) 則f(拍)=拍的三次
請問這選項為什麼錯誤?
還有這題 http://ppt.cc/idv8
g(x)就是f(x)的餘式嗎?
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