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I need help with section 4-8


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Problem 2 (Using the language of predicate logic) (25 marks Con-
sider n real numbers x1, 72, . .., In, where n is a positive integer. We denote
by U the set of the positive integers from 1 from n, that is, U = {1, 2, ..., n}
Using the language of predicate logic, express the following propositions
1. All the numbers x1, x2, . . ., In are positive,
. None of the numbers X1, $2, . . ., In is equal to zero,
All the numbers X1, X2, . . ., In are equal,
The numbers X1, X2, . .., In are pairwise different,
5. At least two numbers among 21, X2, . .., In are equal,
6. At least two numbers among x1, X2, . .., In are not equal,
The numbers x1, X2, . .., n are sorted in increasing order,
8. The numbers x1, x2, ..., In are pairwise different and sorted in increas
ing order.

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