Which of the following is the inverse Z - transform of 𝑧𝑧−𝑎(∣𝑧∣>𝑎)z−az​ (∣z∣>a) ?a)𝑎−𝑛a −n b)ac)1𝑎a1​ d)𝑎𝑛a n

Find the inverse Z-transform of(𝒂) 𝒛𝟑−𝟐𝟎𝒛(𝒛−𝟐)𝟐(𝒛−𝟒) (𝒃) 𝒛𝒛𝟑−𝒛𝟐+𝒛−𝟏 . .

Find the Z-transform of 𝒏𝒄𝒐𝒔(𝒏 𝜽)

Which of the following method is used to find the inverse z-transform of a signal?a.All of the optionsb.Counter integrationc.Expansion into a series of termsd.Partial fraction expansion

What is the z-transform of the signal x(n)=[3(2n)−4(3n)]u(n)𝑥(𝑛)=[3(2𝑛)−4(3𝑛)]𝑢(𝑛) ?Select one:a.3(1+2z−1)−4(1+3z−1)3(1+2𝑧−1)−4(1+3𝑧−1)b.3(1−2z−1)−4(1−3z−1)3(1−2𝑧−1)−4(1−3𝑧−1)c.3(1−2z)−4(1−3z)3(1−2𝑧)−4(1−3𝑧)d.None of the options

[𝟏−𝒄𝒐𝒔 (𝒏𝝅𝟐 )−𝒔𝒊𝒏(𝒏𝝅𝟐 )]𝟐. Z transform of the question