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Maths > Determinants

Determinants

Learning about matrices is incomplete without learning about Determinants. The determinant of a Matrix is computed by all the elements of that matrix. The existence of inverse of a matrix is directly dependent upon the value of its determinant. It is a very useful concept in Algebra. Let’s study more in the topics below.

FAQs on Determinants

Question 1: What is the use of determinants?

Answer: We use determinants for solving linear equations, it captures how linear transformation change area or volume, and for changing variables in integrals. Moreover, we can see determinants as a function whose input is a square and output is a number.

Question 2: What does it mean if a determinant is 1?

Answer: Generally, determinants are defined only for square matrices. Furthermore, if a determinant of a matrix is 0 then the matrix is said to be singular, on the other hand, if the determinant is 1 then it means the matrix is unimodular.

Question 3: Why do we study determinants?

Answer: Simply, the determinants of a matrix refer to a useful tool. As the name suggests, it ‘determines’ things. In addition, while doing matrix algebra, or linear algebra, the determinant allows you to determine whether a system of equations has a unique solution or not.

Question 4: Can determinant be negative?

Answer: A determinant is a real number and it is not a matrix. Furthermore, it can be a negative number. Also, it is not related to absolute value at all except the fact that they both use vertical lines.

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