Toán làm hộ tìm gtln của A biết A= |3x-2016|-|3x+2016| 05/12/2021 By Ayla làm hộ tìm gtln của A biết A= |3x-2016|-|3x+2016|
A=∣3x−2016∣−∣3x+2016∣=∣3x−2016∣+−∣3x+2016∣ \ge|3x-2016-3x+2016|=0≥∣3x−2016−3x+2016∣=0 Dấu “=” xảy ra 3x=2016 x=672 Trả lời
Ta có: $A=|3x-2016|-|3x+2016|$ $A=|3x-2016|+-|3x+2016|\geq|3x-2016-3x+2016|=0$ Dấu “=” xảy ra $⇔3x=2016⇔x=672$ Trả lời
A=∣3x−2016∣−∣3x+2016∣=∣3x−2016∣+−∣3x+2016∣
\ge|3x-2016-3x+2016|=0≥∣3x−2016−3x+2016∣=0
Dấu “=” xảy ra 3x=2016 x=672
Ta có:
$A=|3x-2016|-|3x+2016|$
$A=|3x-2016|+-|3x+2016|\geq|3x-2016-3x+2016|=0$
Dấu “=” xảy ra $⇔3x=2016⇔x=672$