由方程组[img=149x61]1803bbfe63b80bf.png[/img]确定的函数的导数[img=50x47]1803bbfe6bb53c4.png[/img]分别为（ ）
A: [img=109x105]1803bbfe7665519.png[/img]
B: [img=109x105]1803bbfe8046de5.png[/img]
C: [img=109x105]1803bbfe89d41c6.png[/img]
D: [img=109x105]1803bbfe93aca76.png[/img]
A: [img=109x105]1803bbfe7665519.png[/img]
B: [img=109x105]1803bbfe8046de5.png[/img]
C: [img=109x105]1803bbfe89d41c6.png[/img]
D: [img=109x105]1803bbfe93aca76.png[/img]
举一反三
- 由方程组[img=149x61]1803bbee423ca51.png[/img]确定的函数的导数[img=50x47]1803bbee4af5910.png[/img]分别为（ ） A: [img=109x105]1803bbee5541919.png[/img] B: [img=109x105]1803bbee60e5035.png[/img] C: [img=109x105]1803bbee6c320cf.png[/img] D: [img=109x105]1803bbee75dabbf.png[/img]
- 由方程组[img=149x61]1803bbef5d72b5b.png[/img]确定的函数的导数[img=50x47]1803bbef65db046.png[/img]分别为（ ） A: [img=109x105]1803bbef70522a8.png[/img] B: [img=109x105]1803bbef7a2ef80.png[/img] C: [img=109x105]1803bbef84d31f7.png[/img] D: [img=109x105]1803bbef8f5db1d.png[/img]
- 已知随机变量X的分布函数为[img=136x49]1803b69024c8270.png[/img] ，则X的均值和方差分别为 A: E(X)=2, D(X)=4 B: E(X)=4, D(x)=2 C: [img=162x43]1803b6902cd8bfb.png[/img] D: [img=162x43]1803b69034d9ffd.png[/img]
- Which of the following propositions is false,set A = {x,x is an integer and[img=60x23]1803a1c6eebb7a3.png[/img]} ? ( ) A: [img=113x25]1803a1c6f77ce06.png[/img] B: [img=139x25]1803a1c7001fe79.png[/img] C: [img=51x22]1803a1c70863f61.png[/img] D: {x|x is an integer and |x| 4}[img=33x22]1803a1c711a7c63.png[/img]
- Which of the following propositions is false,set A = {x,x is an integer and [img=60x23]1803a1c503ffa04.png[/img]} ? ( ) A: [img=113x25]1803a1c50cc3162.png[/img] B: [img=139x25]1803a1c514e60ea.png[/img] C: [img=51x22]1803a1c51dd52ef.png[/img] D: {x|x is an integer and |x| <4} [img=33x22]1803a1c525cf1bd.png[/img]