Multiplying 2x2 matrix by 2x1

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Multiplying 2x2 matrix by 2x1

Where did the 1 go? This is a 2x2 matrix which I wish to multiply a vector with. I assume right or wrong? However, without the 1, I do not get the correct result. And I don't understand why the function name shows up. I know the detail shows it should use a list, I'm assuming right or wrong again? I've gone over the tutorial many many times to no avail. Am I using the function MatrixForm incorrectly? It shows me that a vector multiplied by a matrix is not the same as a matrix multiplied by a vector. Dang, so simple Do you not get the right answer if you copy and paste those two lines into a notebook and evaluate them? Rohit, Can you explain what you did to get the correct answer? Have I not gone far enough in the tutorial? Learning curve on this is quite steep at Did I put in the wrong order?

I've gone over the tutorial many many times to no avail. Maximum number of runs.

When you consider the order of the matrices involved in a multiplication you look at the digits at the extremes to "see" the order of the result. In this case red digits : color red 2 xx2 and 2xxcolor red 1 So the result will be a 2xx1. The internal ones 2 and 2 tell you if the multiplication is possible when they are equal or not when they are different. If you multiply a 2x2 matrix and a 2x1 matrix the product is a 2x1 matrix? Precalculus Matrix Algebra Multiplication of Matrices. Jul 17, Yes, it wll give you a 2xx1 matrix!

When you consider the order of the matrices involved in a multiplication you look at the digits at the extremes to "see" the order of the result. In this case red digits : color red 2 xx2 and 2xxcolor red 1 So the result will be a 2xx1. The internal ones 2 and 2 tell you if the multiplication is possible when they are equal or not when they are different. If you multiply a 2x2 matrix and a 2x1 matrix the product is a 2x1 matrix? Precalculus Matrix Algebra Multiplication of Matrices. Jul 17, Yes, it wll give you a 2xx1 matrix! Explanation: When you consider the order of the matrices involved in a multiplication you look at the digits at the extremes to "see" the order of the result. Related questions What is multiplication of matrices?

Multiplying 2x2 matrix by 2x1

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Test condition for seconds. Sort student's answers before marking? Define the list of parts that the student can visit after this one. Variable list of choices? Select the China site in Chinese or English for best site performance. One or more notes in this test are no longer defined. Upload a file will be embedded as an iframe. Custom layout expression. Give a worked solution to the whole question. Did I put in the wrong order? Correct answer style. We need to see complete working examples of this, i. Partial credit for wrong precision. Is matrix multiplication associative? Explore mode options.

The next important matrix operation we will explore is multiplication of matrices.

Answers Support MathWorks. Posted 5 years ago. When you need to change the way this part works beyond the available options, you can write JavaScript code to be executed at the times described below. Match test. Unable to complete the action because of changes made to the page. Many thanks for your help! Stephen23 on 7 Jun Partial credit for not matching pattern. I have also resolved the "erratic" behavior I encountered. Mathematics Wolfram Language. Hasn't run yet Running Passed Failed :.