Đáp án:
Giải thích các bước giải:
F=2x+3x2+1⇔x2+2≤2x+3 ⇔x2-2x-2≤0⇔1√3≤x≤1+√3⇒0≤x≤2⇒x=0 (tm)
Choose the best answer.
We are looking for ____ place to spend ____ night.
Please turn off ___ lights when you leave ___ room.
I like _____ colorful costumes of ____ ethnic minority people in Vietnam.