当前位置: X题卡 > 所有题目 > 题目详情

设有数列{an},a1=,若以a1,a2,a3,…,an中相邻两项为系数的二次方程an﹣1x2﹣anx+1=0都有相同的根α、β,且满足3α﹣αβ+3β=1. (1)求证:{an﹣}是等比数列;...

查看本题答案

你可能感兴趣的试题

obj1.show1();  obj2.show1();  obj3.show1();  obj2.show2();  
obj1.show1();  obj2.show1();  obj3.show1();  obj2.show2();  
objshow1();  obj2.show1();  obj3.show1();  obj2.show2();  
obj1. showl();  obj2. showl();  obj3. showl();  obj2. show2();  
A1,A2,A3=10  SET 10 TO A1,A2,A3  LOCAL 10 TO A1,3.2,A3  STORE 10 TO A1,A2,A3  
=(A1+A2+A3)/3  =SUM(A1:A3)/3  =AVERAGE(A1:A3)  =AVERAGE(A1:A2:A3)  
=A1+A2+A3/3  =SUM(A1:A3)/3  =AVERAGE(A1:A3)  =AVERAGE(A1:A2:A3)  
'=(A1+A2+A3)/3  '=SUM(A1:A3)/3  '=AVERAGE(A1:A3)  '=AVERAGE(A1:A2:A3)  
A1,A2,A3=10  SET 10 TO A1,A2,A3  LOCAL 10 TO A1,A2,A3  STORE 10 TO A1,A2,A3  

热门试题

更多