来源:学生作业帮 编辑:灵鹊做题网作业帮 分类:数学作业 时间:2024/05/04 08:06:00
两道英文的微积分题目…求教 大致过程和第二题画图就好
补充图片
y(t) =√[25² - x(t)²]
y'(t) = (1/2){1/√[25² - x(t)²]}*[-2x(t)]*x'(t)
= -x(t)x'(t)/√[25² - x(t)²]
When x = 9,x'(t) = 3,y'(t) = -9*3/(25² - 9²) = -27/12 = -9/4
Apparently the 2nd question is incomplete.