a的三分之一次方乘以(a-8b)除以四乘以b的三分之二次方加二倍的a的三分之一次方乘以b的三分之一.= =在线坐等...
网友回答
原式=a^(1/3)[a^(1/3) - 2b^(1/3)] ÷[1-2b^(1/3)/a^(1/3)]×a^(1/3)
=a^(1/3)[a^(1/3) - 2b^(1/3)] ÷{[a^(1/3)-2b^(1/3)]÷a^(1/3)}×a^(1/3)
= a^(1/3){[a^(1/3) - 2b^(1/3)] ÷[a^(1/3)-2b^(1/3)]}×a^(1/3)×a^(1/3)
=a^(1/3)×a^(1/3)×a^(1/3)
=a