Answered: Which of the following is the correct…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Which of the following is the correct way to perform matrix multiplication between matrices x and y?

Question 6 options:

	dot(x,y)
	cross(x,y)
	x*y
	x.*y

Matrix multiply A times B in that order. What is the value in row 1, column 1 of the result of the multiplication?
A = [1 3 5;
2 4 6];
B = [-2 4;
3 8;
12 -2];

What is the dot product of A and B?
A = [1 3 5]
B = [-3 -2 4]

I want to matrix multiply M times another matrix. How many rows does the other matrix need to have?
M = [1 3 5;
2 4 6;
9 2 1;
7 3 1];

I calculated the determinant of a matrix
and got 0, so...

Question 11 options:

	The matrix does NOT have an inverse
	The matrix has an inverse

Fill in the blank to calculate the determinant of M.
M = [7 2;
1 1]
___________

Question 12 options:

	determinant(M)
	determin(M)
	det(M)
	deter(M)

Question 13 (1 point)

I calculated the determinant of a matrix
and got -4, so...

Question 13 options:

	The matrix does NOT have an inverse
	The matrix has an inverse

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