toán khó

C

callalily

trả lời

[TEX]\frac{a+2010}{a-2010} = \frac{b+2011}{b-2011} [/TEX]
=> [TEX]\frac{a+2010}{b+2011}=\frac{a-2010}{b-2011} [/TEX]

[TEX]a+2010+a-2010[/TEX]
_______________
[TEX]b+2011+ b-2011[/TEX]

= [TEX]\frac{a}{b}[/TEX]%%-
tương tự :
[TEX]a+2010- (a-2010)[/TEX]
______________
[TEX]b+2011- (b-2011)[/TEX]

=[TEX]\frac{2010}{2011}[/TEX]%%-%%-
từ %%-;%%-%%-=> đpcm
 
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