We consider the linear mapping Φ:R3 āR2, x x+y+2z ļ£y7ā ā4x+2yā2z, between the real vector spaces R3 and R2.
a) (1 point) Determine the mapping matrix M E3 (Φ) of Φ with respect to the standard basis E3 of the real vector space R3 (defined as in task G3) and the base A = {-4, 2}.
b) (2 points) Determine the kernel ker(Φ) and the image Φ(R3) of Φ. Is Φ injective? Is Φ surjective?
c) (1.5 points) Show that the three vectors 1 2 ā3 b1 :=ļ£1, b2 :=ļ£0, b3 :=ļ£0 form a basis of R3. We denote this by B.
d) (1.5 points) Find a basis C of the image space R2 such that the mapping matrix with respect to B and C has the shape M(Φ)=
AB
0 1 0
0 0 1