Question

giup ad dyyyyy

Answer 1

Câu nào á bạn?

Answer 2

Câu 5:

\(A=\left|x-1\right|+\left|x+2012\right|=\left|1-x\right|+\left|x+2012\right|\\ \ge\left|1-x+x+2012\right|=2013\\ A_{max}=2013\Leftrightarrow\left(1-x\right)\left(x+2012\right)\ge0\Leftrightarrow-2012\le x\le1\)