Q22 of 23 Page 3

Given,

OR


Find the inverse of the matrix , by using elementary row transformations.(CBSE 2018)

|A| = 5(–1) + 4(1) = –1


C11 = –1 C21 = 8 C31 = –12


C12 = 0 C22 = 1 C32 = –2


C13 = 1 C23 = –10 C33 = 15





Hence,


OR


Using, AA–1 = I


A = IA











Hence,

More from this chapter

All 23 →
19

Find matrix A such that

(CBSE 2017)

 20

Find the matrix A such that

(CBSE 2017)

 21

If is a matrix satisfying AA' = 9I, find x.(CBSE 2018)

23

Using matrices, solve the following system of equations:

4x + 3y + 3z = 60, x + 2y + 3z = 45 and 6x + 2y + 3z =70 (CBSE 2011)