作业帮计算下列各题要写过程
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计算下列各题要写过程
计算下列各题要写过程
计算下列各题要写过程
等于a-1/a+2*(a+2)*(a-2)/(a-1)²+1/a²-1=a-2/a-1+1/a²-1=a²-a-1/a²-1
=(a-1)/(a+2)x[(a-2)(a+2/(a-1)^2]+1/[(a+1)(a-1)]
=(a-2)/(a-1)+1/[(a+1)(a-1)]
=(a^2-a-1)/(a^2-1)
~满意还望采纳~
~谢谢~
o(︶︿︶)o对不对，放心/是什么意思等等，后面除号看成加号了哦=(a-1)/(a+2)x[(a-2)(a+2/(a-1)^2]x[(a+1)...
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=(a-1)/(a+2)x[(a-2)(a+2/(a-1)^2]+1/[(a+1)(a-1)]
=(a-2)/(a-1)+1/[(a+1)(a-1)]
=(a^2-a-1)/(a^2-1)
~满意还望采纳~
~谢谢~
o(︶︿︶)o
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