观察下列各式:(x2-1)÷(x-1)=x+1(x3-1)÷(x-1)=x2+x+1(x4-1)÷(x-1)=x3+x2+x+1(x5-1)÷(

2025-02-27 13:54:05
推荐回答(1个)
回答1:

(1)∵(x2-1)÷(x-1)=x+1,
(x3-1)÷(x-1)=x2+x+1,
(x4-1)÷(x-1)=x3+x2+x+1,
(x5-1)÷(x-1)=x4+x3+x2+x+1,
∴(xn-1)÷(x-1)=xn-1+xn-2+…+1,
∴(x6-1)÷(x-1)=x5+x4+x3+x2+x+1;

(2)∵(x6-1)÷(x-1)=x5+x4+x3+x2+x+1,
∴x6-1=(x-1)(x5+x4+x3+x2+x+1).