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lim_(q->1) x p^((q - 1)/q - 1) (x p^((q - 1)/q) + (1 - x) z^((q - 1)/q))^(q/(q - 1) - 1)
lim_(q->1) x p^((q - 1)/q - 1) (x p^((q - 1)/q) + (1 - x) z^((q - 1)/q))^(q/(q - 1) - 1)
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