Question

so sánh a với 1 biết :

2012*2010+2013

2011*2011+2012

giúp mik với

 

Answer 1

Là sao bn ? bn hỏi rõ hơn đc k ? câu hỏi k rõ ràng cho lắm :v

Answer 2

\(A=\frac{2012.2010+2013}{2011.2011+2012}\)

\(\Rightarrow A=\frac{\left(2011+1\right).\left(2011-1\right)+2013}{2011.2011+2012}\)

\(\Rightarrow A=\frac{2011\left(2011+1\right)-2011-1+2013}{2011.2011+2012}\)

\(\Rightarrow A=\frac{2011^2+2011-2011-1+2013}{2011^2+2012}\)

\(\Rightarrow A=\frac{2011^2-1+2013}{2011^2+2012}\)

\(\Rightarrow A=\frac{2011^2+2012}{2011^2+2012}=1\)

Vậy A = 1