Let e1, . . . , en be the n elementary vectors in Rn. Consider the linear transfor- mation T : Rn → Rn satisfying the following equations:
T(e1) = e1−e2
T(e2) = e2−e3
. .
T(en) = en−e1.
(a) What is ker(T)?
(b) What is im(T)?
(c) Let In : Rn → Rn be the identity linear transformation. Is the linear transformation T − In invertible? Justify your answer. (If it is invertible, you do not need to solve for the inverse.)
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