1. Using matrix method, solve the following system of equations :
2/x + 3/y + 10/z = 4, 4/x - 6/y + 5/z = 1, 6/x + 9/y - 20/z = 2
2. For what value of x, the matrix [5-x x+1
2 4 ] is singular?
1. See there is nothing to panic just becoz your matrix X now consists of 1/x,1/y&1/z. Just substitute 1/x=p, 1/y=q & 1/z=r and proceed as usual!! After u have found the value of p,r&r put the p=1/x, q=1/y & r=1/z.....
2. For a matrix to be singular its determinant must be equal to zero. So, we have: 2(5-x)-4(x+1)=0 =>x=1