I am unable to get the answer to the following question: Find all the values of (x,y,z) which satisfy:
if (p,q,r) satisfies
So, we have:
detA = 7(-1) -2(-2) + 4(1) = 1. So it has an inverse. I used two methods to calculate the inverse, the adjoint and row reduction. Both gave the same result:
The second matrix B is singular i.e.
But we have the following relationships:
I messed around and got:
p = 7x + 2y + 4z
q = 4x + y + 2z
r = 3x + y + z
but this doesn't help. The answers are given in terms of Am I missing something here?