These Determinants Class 12 MCQ And Answers are most important for your upcoming examinations including JEE Main & JEE Advanced. These Determinants Class 12 MCQ And Answers will help you to score good marks in your exams by helping you to prepare the concepts better and hence, help you to understand the concepts more clearly.

## Determinants Class 12 MCQ And Answers

1. If then the value of x is

(A) ±2

(B) ±1/3

(C) ±√3

(D) ± (0.5)

**Answer:** ±√3

2. The determinant equals

(A) abc(b – c)(c -a)(a – b)

(B) (b – c)(c – a)(a – b)

(C) (a + b + c)(b – c)(c – a)(a – b)

(D) None of these

**Answer:** None of these

3. If f(x) = then

(A) f(a) = 0

(B) f(b) = 0

(C) f(0) = 0

(D) f(1) = 0

**Answer:** f(0) = 0

4. There are two values of a which makes determinant Δ = = 86, then sum of these number is

(A) 4

(B) 5

(C) -4

(D) 9

**Answer:** -4

5.

(A) (a + b)²

(B) (a + b + c + d)²

(C) (a² + b² – c² – d²)

(D) a² + b² + c² + a²

**Answer:** a² + b² + c² + a²

6. The value of is independent of

(A) α

(B) β

(C) α.β

(D) None of these

**Answer:** α

7. If x is equal to

(A) 6

(B) ±6

(C) -1

(D) -6

**Answer:** ±6

8. The value of the determinant

(A) 124

(B) 125

(C) 134

(D) 144

**Answer:** 134

9. The value of the determinant

(A) (α + β)(β + γ)(γ + α)

(B) (α – β)(β – γ) (γ – α) (α + β + γ)

(C) (α + β + γ)² (α – β – γ)²

(D) αβγ (α + β + γ)

**Answer:** (α – β)(β – γ) (γ – α) (α + β + γ)

10. is equal to

(A) 6xyz

(B) xyz

(C) 4xyz

(D) xy + yz + zx

**Answer:** 4xyz

11. The maximum value of is (θ is real number)

(A) 1/2

(B) √3/2

(C) 2√3/4

(D) √2

**Answer:** 1/2

12. If x, y, z are all different from zero and = 0, then value of x^{-1}+ y^{-1} + z^{-1} is

(A) xyz

(B) x^{-1}y^{-1}z^{-1}

(C) -x – y – z

(D) -1

**Answer:** -1

13. If A, B and C are angles of a triangle, then the determinant

(A) 0

(B) -1

(C) 1

(D) None of these

**Answer:** 0

14. Evaluate the determinant Δ =

(A) 15/2

(B) 12

(C) 14/3

(D) 6

**Answer:** 15/2

15. A = |A³| = 125 then α =

(A) ±3

(B) ±2

(C) ±5

(D) 0

**Answer:** ±3

16. If w is a non-real root of the equation x² – 1 = 0. Then

(A) 0

(B) 1

(C) ω

(D) ω²

**Answer:** 0

17. is equal to

(A) abc

(B) ab + bc + ca

(C) 0

(D) (a – b)(b – c)(c – a)

**Answer:** 0

18. The value of determinant

(A) a³ + b³ + c ³

(B) 3bc

(C) a³ + b³ + c³ – 3abc

(D) None of these

**Answer:** a³ + b³ + c³ – 3abc

19. If A = then A-1 exists if

(A) λ = 2

(B) λ ≠ 2

(C) λ ≠ -2

(D) None of these

**Answer:** None of these

20.

(A) 0

(B) 1

(C) 2

(D) 3

**Answer:** 1