y=x⼀√(x^2+4).求y的导数?

2025-05-21 16:01:40
推荐回答(1个)
回答(1):

y'=[(x^2+4)^(1/2)-x*(1/2)*(x^2+4)^(-1/2)*2x]/(x^2+4)
=(4-x^2)/(x^2+4)^(3/2).