Selftest: The determinant of a matrix

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Exercises for chapter Matrices | Article: Determinant of a matrix

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1. Consider the matrix multiplication $\mathbf{A}\cdot\mathbf{B}$. Which statement describes the requirements for this multiplication correctly?

	number of rows of $\mathbf{A}$ has to equal number of colums of $\mathbf{B}$
	number of rows of $\mathbf{A}$ has to equal number of rows of $\mathbf{B}$
	number of colums of $\mathbf{A}$ has to equal number of rows of $\mathbf{B}$
	number of colums of $\mathbf{A}$ has to equal number of colums of $\mathbf{B}$

2. Which dimensions does the resulting matrix of a multiplication of an l-by-m with an m-by-n matrix have?

	m-by-m
	l-by-n
	l-by-m
	m-by-n

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