Test: Introduction To Determinants


10 Questions MCQ Test Mathematics (Maths) Class 12 | Test: Introduction To Determinants


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QUESTION: 1

Order of a matrix [ 2 5 7 ] is

Solution:
QUESTION: 2

The value of 

Solution:

To find the determinant we have to cross mutliply the elements and then substract it.

QUESTION: 3

If  , then the value of |2A| is same as​

Solution:

Due to the rule if a square matrix is of order n x n then, |kA|= k^(n) |A|

QUESTION: 4

Value of the determinant 

Solution:

(a2 + b2)×1 - (2a) × b
= a2 +b2 - 2ab
= (a - b)2
i.e. option A

QUESTION: 5

​If , then the value of x is 

Solution:

Determinant of both matrix is equal

(1×1) -(1×1)= 4*X - 2*1.
0= 4*X-2.
4*X=2.
X=2/4.
X=1/2.

QUESTION: 6

Solution:

Determinant = [(a2 + b2).1 - (-2ab)(b)]

QUESTION: 7

If , then the value of x is  ​

Solution:
QUESTION: 8

 , then the value of x is​

Solution:
QUESTION: 9

The value of  is​

Solution:
QUESTION: 10

Solution:

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