ONE QUESTION, ONE STEP
ZX-D32C2B17D72024年8月北美D卷(易) · 第 7 题
2024年8月北美D卷(易) · 原库模块 1 · Q7 原库参考解析
An object is kicked from a platform. The equation \( h=-4.9t^2+5t+9 \) represents this situation, where h is the height of the object above the ground, in meters, t seconds after it is kicked. Which number represents the height, in meters, from which the object was kicked?
参考答案：
解题思路
容易忽略的一步
