计算:(1)4xy²÷(-2x的-2次方yz的-1次方);

计算:(1)4xy²÷(-2x的-2次方yz的-1次方);
计算:(1)4xy²÷(-2x的-2次方yz的-1次方);

计算:(1)4xy²÷(-2x的-2次方yz的-1次方);
(1)
4xy²÷(-2x^(-2)yz^(-1))
=-2xy²*x²z/y
=-2x³yz
(2)
[1-1/(a+1)]÷a/(a²+2a+1)
=a/(a+1)*(a²+2a+1)/a
=a+1
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1.-2的x的3次方yz

1、-2x³yz

2、=(a+1-1)/(a+1)×(a+1)²/a
=a/(a+1)×(a+1)²/a
=a+1