已知：多项式x2次方-(3k-1)xy-3y的二次方+3mxy-8中不含xy项求8k+1次方×4÷2的3m+2次方的值
问题描述：
已知：多项式x2次方-(3k-1)xy-3y的二次方+3mxy-8中不含xy项求8k+1次方×4÷2的3m+2次方的值
答
-(3k-1)+3m=0
3m-3k+1=0
3m-3k=-1
8k+1次方×4÷2的3m+2次方
=8^(k+1)×4÷2^(3m+2)
=2^3(k+1)×2^2÷2^(3m+2)
=2^[3(k+1)+2-(3m+2)]
=2^[3k+3+2-3m-2]
=2^[3k-3m+3]
=2^[-1+3]
=2^2
=4