Question: some one help? Question 9. Does the formula |Ixll := M x, define a norm on R? 1=1 Question 10. Among all the unit vectors

some one help?

some one help? Question 9. Does the formula |Ixll := M x,

Question 9. Does the formula |Ixll := M x, define a norm on R"? 1=1 Question 10. Among all the unit vectors X E R4, find the one for which the sum x1 + 2x2 + 3x3 + 4x4 is minimal. What is the minimal value? Question 11. Show that the following formula defines an inner product on the vector space of all m X n matrices. (A, B) := trace(A B)

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