1.
Ax=⎝⎛12−13−10−1−12−240⎠⎞⎝⎛x1x2x3⎠⎞=⎝⎛x1−x2+2x32x1−2x3−x1−x2+4x33x1−x2⎠⎞
transformation matrix:
A=⎝⎛12−13−10−1−12−240⎠⎞
2.
kernel:
x1−x2+2x3=0
2x1−2x3=0
−x1−x2+4x3=0
3x1−x2=0
x1=x3,x2=3x1
ker T=span(1,3,1)
range:
range T=⎝⎛x1−x2+2x32x1−2x3−x1−x2+4x33x1−x2⎠⎞=x1⎝⎛12−13⎠⎞+x2⎝⎛−10−1−1⎠⎞+x3⎝⎛2−240⎠⎞=
=span((1,2,−1,3),(−1,0,−1,−1),(2,−2,4,0))
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