Question 2124 – Nielit Scientific Assistance CS 15-10-2017
December 12, 2023Question 2138 – Nielit Scientific Assistance CS 15-10-2017
December 12, 2023Question 2136 – Nielit Scientific Assistance CS 15-10-2017
M is a square matrix of order ‘n’ and its determinant value is 5. If all the elements of M are multiplied by 2, Its determinant value becomes 40. The value of ‘n’ is
Correct Answer: B
Question 56 Explanation:
● From the matrix property :
If each element of a row (or a column) of a determinant is multiplied by a constant k, then its value gets multiplied by k.
● Consider matrix order is 3, there are 3 rows and each row is multiplied by 2 means we need to multiply 8 to the existing determinant.
● The given existing determinant is 5 and each row multiplied by 2 means 8 *5 =40.
If each element of a row (or a column) of a determinant is multiplied by a constant k, then its value gets multiplied by k.
● Consider matrix order is 3, there are 3 rows and each row is multiplied by 2 means we need to multiply 8 to the existing determinant.
● The given existing determinant is 5 and each row multiplied by 2 means 8 *5 =40.
2
3
5
4