❤️Math Follow Me and Practice everyday 💯
🤔️跟我一起做💯
🌹Topic today：Functions函数
🔑Key words
▶️equality of two functions两个函数相等
▶️domain定义域，range值域
▶️graph of a function函数图，set of points点集
▶️coordinates坐标，coordinate axes坐标轴，coordinate plane坐标平面，origin原点
❤️Math Follow Me and Practice everyday 💯
🤔️跟我一起做💯
🌹Topic today：Functions函数
🔑Key words
▶️equality of two functions两个函数相等
▶️domain定义域，range值域
▶️graph of a function函数图，set of points点集
▶️coordinates坐标，coordinate axes坐标轴，coordinate plane坐标平面，origin原点