已知α+θ=1,αθ=﹣1.设S1=α+θ,S2=α2+θ2,S3=α3+θ3,
题型:解答题
问题:
已知α+θ=1,αθ=﹣1.设S1=α+θ,S2=α2+θ2,S3=α3+θ3,…,Sn=αn+θn
(1)计算:S1=_________,S2=_________,S3=_________,S4=_________;
(2)试写出Sn﹣2、Sn﹣1、Sn三者之间的关系;
(3)根据以上得出结论计算:α7+θ7.
已知α+θ=1,αθ=﹣1.设S1=α+θ,S2=α2+θ2,S3=α3+θ3,…,Sn=αn+θn
(1)计算:S1=_________,S2=_________,S3=_________,S4=_________;
(2)试写出Sn﹣2、Sn﹣1、Sn三者之间的关系;
(3)根据以上得出结论计算:α7+θ7.