帮我算9-x^2的导数
(9-x^2)的导数=-2x
~~~~~ =-2x*(-2x)=4x^2
~~~~~ =-2x*2x=-4x^2
~ =(3+x)(3-x)的导数=-1(3+x)+3-x=-2x
要怎样算
参考答案:直接用公式9-x^2的导数=9'-(x^2)'=0-2x=-2x
(9-x^2)的导数=-2x
~~~~~ =-2x*(-2x)=4x^2
~~~~~ =-2x*2x=-4x^2
~ =(3+x)(3-x)的导数=-1(3+x)+3-x=-2x
要怎样算
参考答案:直接用公式9-x^2的导数=9'-(x^2)'=0-2x=-2x