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Determine the DTFT of the sequence $$y[n] = (n + 1) \alpha^{n} u[n], \mid \alpha \mid < 1.u[n]$$ is unit step sequence
$$Y(e^{j \omega }) = \frac{1}{(1 - \alpha e^{-j \omega })^2}$$
$$Y(e^{j \omega }) = \frac{1}{(1 + \alpha e^{-j \omega })^2}$$
$$Y(e^{j \omega }) = \frac{\alpha}{(1 - \alpha e^{-j \omega })^2}$$
none of the above
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