The sum-of-the-years’ digits and depreciation rate fraction for year 2, year 4 and year 6 when the useful life is 9 years.

Question

4. 5. 6. Prove that p (gp) is a tautology using the laws of propositional logic. Prove that p((pVq) → q) is a tautology using the laws of propositional logic. Let us say a natural number n is ok if there are two natural numbers whose sum is n and whose product is n. (Convention: the natural numbers consist of 0, 1, 2,...) (a) Give a logical expression that means "n is ok". (b) Show that 0 and 4 are both ok. (c) Give a logical expression that means "every natural number is ok". (d) Give a logical expression that means "it is not the case that every number is ok". Push the negations into the expression as far as possible.

Answer 1

Question

Chapter 17, Problem 5AT

To determine

To calculate: The sum-of-the-years’ digits and depreciation rate fraction for year 2, year 4 and year 6 when the useful life is 9 years.

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