【正文】
南京市第三十九中學 θ 第 2. 1. 1節(jié)開頭的第三個問題中,氣溫 θ 是關(guān)于時間 t的函數(shù) 4 8 12 16 20 24 t o 2 2 4 8 6 10 x y o y Y=2x+1 x o Y=(x1)21 1 2 1 y x y =x3 o y O x x1y ?O x y x()fx2()f x x?O x y x()fx2()f x x?x O x y x()fx2()f x x?O x y x()fx2()f x x?O x y x()fx2()f x x?O x y x()fx2()f x x?O x y x()fx2()f x x?O x