a=(1+1/2+1/3+1/4)*(1/2+1/3+1/4+1/5),
b=(1+1/2+1/3+1/4+1/5)+(1/2+1/3+1/4),
问a与b哪个大?大多少?
要有过程
a=(1+1/2+1/3+1/4)*(1/2+1/3+1/4+1/5),
b=(1+1/2+1/3+1/4+1/5)+(1/2+1/3+1/4),
问a与b哪个大?大多少?
要有过程
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A>B
您好!
a-b=ab-(a+1/5)*(b-1/5)
=ab-ab-1/5b+1/5a+1/25
=1/5(a+b)+1/25
=1/5*4/5+1/25
=4/25+1/25
=1/5