Coursera Machine Learning 第一周 quiz Linear Algebra习题答案
2016-11-09 00:08
2679 查看
1.
Let two matrices be
A=[4639],B=[−2−592]
What is A + B?
答案为B 互相加即可
[611−67]
[211211]
[2192]
[6111211]
Let x=⎡⎣⎢⎢8251⎤⎦⎥⎥
2.What is 2∗x?
答案C直接乘即可
[415212]
⎡⎣⎢⎢⎢⎢415212⎤⎦⎥⎥⎥⎥
⎡⎣⎢⎢164102⎤⎦⎥⎥
[164102]
3.
Let u be a 3-dimensional vector, where specifically
u=⎡⎣519⎤⎦
What is uT?
答案 A
[519]
[915]
⎡⎣519⎤⎦
⎡⎣915⎤⎦
4.
Let u and v be 3-dimensional vectors, where specifically
u=⎡⎣13−1⎤⎦
and
v=⎡⎣224⎤⎦
What is uTv?
(Hint: uT is
a
1x3 dimensional matrix, and v can also be seen as a 3x1
matrix. The answer you want can be obtained by taking
the matrix product of uT and v.)
Do not add brackets to your answer.
答案4
5.Let A and B be 3x3 (square) matrices. Which of the following
must necessarily hold true? Check all that apply.
答案CD
If C=A∗B,
then C is a 6x6 matrix.
A∗B=B∗A
A+B=B+A
If A is the 3x3 identity matrix, then A∗B=B∗A
Let two matrices be
A=[4639],B=[−2−592]
What is A + B?
答案为B 互相加即可
[611−67]
[211211]
[2192]
[6111211]
Let x=⎡⎣⎢⎢8251⎤⎦⎥⎥
2.What is 2∗x?
答案C直接乘即可
[415212]
⎡⎣⎢⎢⎢⎢415212⎤⎦⎥⎥⎥⎥
⎡⎣⎢⎢164102⎤⎦⎥⎥
[164102]
3.
Let u be a 3-dimensional vector, where specifically
u=⎡⎣519⎤⎦
What is uT?
答案 A
[519]
[915]
⎡⎣519⎤⎦
⎡⎣915⎤⎦
4.
Let u and v be 3-dimensional vectors, where specifically
u=⎡⎣13−1⎤⎦
and
v=⎡⎣224⎤⎦
What is uTv?
(Hint: uT is
a
1x3 dimensional matrix, and v can also be seen as a 3x1
matrix. The answer you want can be obtained by taking
the matrix product of uT and v.)
Do not add brackets to your answer.
答案4
5.Let A and B be 3x3 (square) matrices. Which of the following
must necessarily hold true? Check all that apply.
答案CD
If C=A∗B,
then C is a 6x6 matrix.
A∗B=B∗A
A+B=B+A
If A is the 3x3 identity matrix, then A∗B=B∗A
相关文章推荐
- Coursera Machine Learning 第一周 quiz Linear Regression with One Variable 习题答案
- Coursera Machine Learning 第二周 quiz Octave/Matlab Tutorial 习题答案
- Coursera machine learning 第二周 quiz 答案 Linear Regression with Multiple Variables
- Coursera Machine Learning 第二周 quiz Linear Regression with Multiple Variables 习题答案 标签: Andrew NgCour
- coursera Machine Learning 第九周 测验quiz2答案解析 Recommender Systems
- Coursera Machine Learning 第二周 quiz Linear Regression with Multiple Variables 习题答案
- coursera Machine Learning 第十周 测验quiz答案解析Large Scale Machine Learning
- coursera Machine Learning 第五周 测验quiz答案解析 Neural Networks: Learning
- Coursera Machine Learning quiz 参考答案(不一定对)
- coursera Machine Learning 第四周 测验quiz答案解析 Neural Networks: Representation
- Coursera Machine Learning 第一周 引言(Introduction) quiz 习题答案
- coursera Machine Learning 第六周 测验quiz2答案解析 Machine Learning System Design
- Coursera Machine Learning 第十周 quiz Large Scale Machine Learning
- Coursera deeplearning.ai 深度学习习题3-1-Structuring Machine Learning Projects(1)
- Coursera Machine Learning 作业答案脚本 分享在github上
- Coursera Machine Learning 第十周 quiz Large Scale Machine Learning
- 【吴恩达 Coursera深度学习课程】 Neural Networks and Deep Learning 第一周课后习题
- coursera Machine Learning 第九周 测验quiz1答案解析 Anomaly Detection
- Coursera Machine Learning 第三周 quiz Logistic Regression
- Coursera Machine Learning 第五周 quiz Neural Networks: Learning