CBSE Class 12-science - Elementary Operations Videos

• how to solve the adjoint of 3×3 matrix
  
• Solve only by using elementary operations not Adjoints:
  
• An amont of 600 crores is spent by the Government in 3 Schemes (A,B,C). Now twice the amount spent on Scheme C together with the amount spent on Scheme A is Rs. 500 crores. Three times the amount spent on Scheme A together with the amount spent on Scheme B and Scheme C is Rs. 1200 crores.Find the amount spent on each scheme using matrices.Read more on Sarthaks.com - https://www.sarthaks.com/547624/an-amont-of-600-crores-is-spent-by-the-government-in-3-schemes-a-b-c
• find a^-1 using elementary row operation of  a=   
• solve the following system of linear equations using matrix method 2x-y-z=7,3x+y-z=7,x+y-z=3  
• Solve by matrix method: 2x+y+2z=5, x-y-z=0, x+2y+3z=5.
• find inverse of matrix using elementary row operation(ignore absence of bracket) 0   1     2 1   2     3 3   1     1
• find inverse of matrx using elementary row operation (i)   1     2        2    -1 ii )    2      5        -3      1 ignore ithe absence of braclet and consider it in square bracket also sate the key method to find matrix
• Define invertible matrix with example.
• Find , if it exist, given

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