Question #210528

Let T€L(R) such that - 4,5 and root 7 are its eigenvalues. Show that T(x) - 9x=(- 4,5, root 7)


1
Expert's answer
2022-01-31T10:06:55-0500

Since T has at most 3 distinct eigenvalues , the hypothesis imply that 9 is not an eigenvalue of T.

Thus T − 9I is surjective. In particular, there exists xR3x\isin R^3 such that

(T9I)x=Tx9x=(4,5,7)(T − 9I)x = T x − 9x = (4, −5, \sqrt7)



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