【简答题】已知数列{ a n }是公差为 d 的等差数列,数列{ b n }是公比为 q 的( q ∈R且 q ≠1)的等比数列,若函数 f ( x )=( x -1) 2 ,且 a 1 = f ( d -1), a 3 = f ( d +1), b 1 = f ( q +1), b 3 = f ( q -1), (1)求数列{ a n }和{ b n }的通项公式; (2)设数列{ c n }的前 n 项...
【简答题】已知函数f(x)=(x-1) 2 ,数列{a n }是公差为d的等差数列,数列{b n }是公比为q(q∈R且q≠1)的等比数列.若a 1 =f(d-1),a 3 =f(d+1),b 1 =f(q-1),b 3 =f(q+1) (1)求数列{a n },{b n }的通项公式; (2)设数列{C n }对任意n均有 C 1 b 1 + C 2 b 2 +…+ C n b n = a n+1 ...