Problem

Let p(x), q(x),and r(x)be the following open statements.p(x):x2 – 7x+10 = 0q(x): x2 – 2x –...

Let p(x), q(x),and r(x)be the following open statements.

p(x):x2 – 7x+10 = 0

q(x): x2 – 2x – 3 = 0

r(x):x < 0

a) Determine the truth or falsity of the following statements, where the universe is all integers. If a statement is false, provide a counterexample or explanation.

i)x [p(x)→ ¬r(x)]


ii)x [q(x) → r(x)]


iii)x[q(x) → r (x)]


iv)x[p(x) → r(x)]


b) Find the answers to part (a) when the universe consists of all positive integers.


c) Find the answers to part (a) when the universe contains only the integers 2 and 5.

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Solutions For Problems in Chapter 2.4