Tính thời gian ngắn nhất vật đi từ li độ A/2 đến li độ A

are you an artist's daughter? cuz dang you a fine piece of art, girl.

the answer is two. hope this !

in geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel. by extension, a line and a plane, or two planes, in three-dimensional euclidean space that do not share a point are said to be parallel.

0lz try yourself sorry for not answering