计算:(2a+1)/(4a-1)-(a+1)/(1-4a)+(5a-4)/(4a-1)
问题描述:
计算:(2a+1)/(4a-1)-(a+1)/(1-4a)+(5a-4)/(4a-1)
答
(2a+1)/(4a-1)-(a+1)/(1-4a)+(5a-4)/(4a-1)
=(2a+1)/(4a-1)+(a+1)/(4a-1)+(5a-4)/(4a-1)
=(2a+1+a+1+5a-4)/(4a-1)
=(8a-2)/(4a-1)
=2
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