(高數(shù))設(shè)冪級(jí)數(shù)∑anx^n,當(dāng)n>1時(shí)an-2=n(n-1)an,且a0=4,a1=1;(1)求冪級(jí)數(shù)∑anx^n的和函數(shù)S(x)
設(shè)冪級(jí)數(shù)∑anx^n,當(dāng)n>1時(shí)an-2=n(n-1)an,且a0=4,a1=1;
(1)求冪級(jí)數(shù)∑anx^n的和函數(shù)S(x);
(2)求和函數(shù)S(x)的極值