(-3分之1x的3n次方)的4次方÷[4(x³)的2n次方]
=1/81x的12n次方÷4x的6n次方
=1/324x的6次方
=1/324(x的2n次方)³
=1/324x3³
=1/324x27
=1/12
如果本题有什么不明白可以追问,