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(a+1-4a-5/a-1)除以(1/a-1-2/a的二次幂-a)
题目详情
(a+1 -4a-5/a-1)除以(1/a-1-2/a的二次幂-a)
▼优质解答
答案和解析
[a+1-(4a-5)/(a-1)]÷[1/(a-1)-2/(a的二次幂-a)]
=[a+1-(4a-5)/(a-1)]÷[1/(a-1)-2/a(a-1)]
=[(a+1)(a-1)-(4a-5)]÷(1-2/a)
=(a+2)^2÷(a-2)/a
=a(a+2)^2/(a-2)
^2表示平方
如果不懂,祝学习愉快!
=[a+1-(4a-5)/(a-1)]÷[1/(a-1)-2/a(a-1)]
=[(a+1)(a-1)-(4a-5)]÷(1-2/a)
=(a+2)^2÷(a-2)/a
=a(a+2)^2/(a-2)
^2表示平方
如果不懂,祝学习愉快!
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