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Use the information below to answer the following questions.
Crystal Computers owns a chain of seven shops selling computer goods. In the past the company maintained a healthy cash balance. However, this has fallen in recent months, and at the end of September 2018 it had an overdraft of $100,000. In view of this, its managing director has asked you to prepare a cash forecast for the next six months. You have collected the following information:
-Refer to the table above. The projected cash balance at the end of November is:
Quantifier Negation
The logical operation of negating the quantifiers within a statement, which often changes the scope or meaning of the statement.
Existential Generalization
A logical inference rule stating that if an assertion is true for some member of a domain, then there exists an element in that domain for which the assertion holds.
Universal Generalization
A logical principle stating that what is true of all instances of a certain class can be said to be generally true of that class.
Existential Instantiation
A logical principle allowing for the inference of the existence of an instance of a predicate from a statement asserting the existence of some (possibly unspecified) instance.
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