find the answers

Question

i) Find the Z transform of the functions: f(n)=7^-n cosnθ
ii) Find the Z transform of the functions: f(n)=5n+7cos(nπ/4)-9k
iii) Find the Z transform of the functions: f(n)=9n+3^-n sinnθ
iv) Find Z- inverse transform Z^-1[2z/(z-2)(z-2)]
v) Find the Z Inverse Transformation of the following function
F(z)=z/(z-1)(z+6)(z-1)

Answer

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