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Gate-Geology-and-Geophysics-2014-->View question

## The convolution of two finite length sequences xn = [1, 0, -2] and yn = [1, -1] is: (-Gate geology and geophysics 2014)

##### (A) [-1, 1, 2, -2] (B) [1, -1, -2, 2] (C) [1, 0, -2, 2] (D) [1, -2, -1, 2]

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The convolution of two finite length sequences xn = [1, 0, -2] and yn = [1, -1] is
(B) [1, -1, -2, 2]

If the input and impulse response of a system are x[n] and h[n] respectively, the convolution is given by the expression,

x[n] * h[n] = ε x[k] h[n-k]

Where k ranges between -∞ and ∞

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