Find k k\,k if x=2x=2x=2, y=−1y=-1y=−1, z=3z=3z=3 satisfies x+y+z=4x+y+z=4x+y+z=4, 2x−ky+z=92x-ky+z=92x−ky+z=9 and kx+y−z=0kx+y-z=0kx+y−z=0.
8 exam-style questions on CCEA A Level Maths 1.1.8 Algebra and functions. Each one has a worked solution and a mark scheme showing where the marks go.