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Part B.
Solving the following problems(50%)(每一大題10分,請務必寫出計算過程)
(11) (10pt) Find the rank of A:

其他申論題

(2) What is the difference between a computer virus and a computer worm?

(3) Give two common solutions to deal with the sctuid-on problem in UNIX.

(4) What are masquerading and replay attack?

(5) What is the purpose of authentication? What is non-repudiation?

(12) (10pt) Calculate the matrix function, where the matrix M is defined as

(13)(10pt )For a quadratic form Q = xTAx, if for any nonzero we always have Q ＞0, then this quadratic form is positive definite. For n=3 and , is the quadratic form Q=x TAx positive definite?

(a) (5pt) Express the surface equation in the form f(x, y,z) =1. Find f(x,y,z).

(b) (5pt) Find the unit normal vector of the surface at an arbitrary point.

15. (10pt) Find the Fourier transform of the function:

(a) Prepare the journal entries required for the depot and the environmental liability on January 1, 2015.

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