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Q8. Give an expression in terms of the second differences for. a) Xt - 5Xt-1 + 7Xt-2 - 3Xt-3 b) Xt - 5Xt-1 + 7Xt-2

Q8. Give an expression in terms of the second differences for. a) Xt - 5Xt-1 + 7Xt-2 - 3Xt-3 b) Xt - 5Xt-1 + 7Xt-2 - 3Xt-3

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