Ex 4.1, 8 - Chapter 4 Class 12 Determinants (Term 1)
Last updated at Aug. 9, 2021 by Teachoo
Transcript
Ex 4.1, 8 If x 2 18 x = 6 2 18 6 , then x is equal to (A) 6 (B) 6 (C) 6 (D) 0 Given x 2 18 x = 6 2 18 6 Putting values x2 36 = 0 x2 62 = 0 (x 6) (x + 6) = 0 So , x = 6, x = 6 Hence value of x = 6 . Correct answer is B
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Finding determinant of a 2x2 matrix
What is determinant?
Finding Determinant
Important things to note in Determinants
Example 1
Ex 4.2, 16 (MCQ) Deleted for CBSE Board 2022 Exams
Ex 4.1,1
Ex 4.1, 2 (i)
Ex 4.1, 3 Important
Example 2
Ex 4.1, 8 (MCQ) You are here
Example 5 Important
Ex 4.1, 7 (i) Important
What is the difference between Matrix & Determinant?
Chapter 4 Class 12 Determinants (Term 1)
Concept wise
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Finding determinant of a 2x2 matrix
- Evalute determinant of a 3x3 matrix
- Area of triangle
- Equation of line using determinant
- Finding Minors and cofactors
- Evaluating determinant using minor and co-factor
- Find adjoint of a matrix
- Finding Inverse of a matrix
- Inverse of two matrices and verifying properties
- Finding inverse when Equation of matrice given
- Checking consistency of equations
- Find solution of equations- Equations given
- Find solution of equations- Statement given
- Verifying properties of a determinant
- Two rows or columns same
- Whole row/column zero
- Whole row/column one
- Making whole row/column one and simplifying
- Proving Determinant 1 = Determinant 2
- Solving by simplifying det.
- Using Property 5 (Determinant as sum of two or more determinants)
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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.