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Q)

The modulus and amplitude of the complex number $[e^{3-i \pi/4}]^{3}$ is respectively

\[\begin{array}{1 1}(1)e^{9},\frac{\pi}{2}&(2)e^{9},\frac{-\pi}{2}\\(3)e^{6},\frac{-3\pi}{4}&(4)e^{9},\frac{-\pi}{4}\end{array}\]

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