问题 填空题

(8xn+2-6xn+1+2xn)÷(2xn-1)=______.

答案

(8xn+2-6xn+1+2xn)÷(2xn-1),

=8xn+2÷2xn-1-6xn+1÷2xn-1+2xn÷2xn-1

=4x3-3x2+x.

单项选择题
多项选择题