Which of the following pairs of keywords in Java are often used to declare values that must remain constant: (A)static, final (B) public, void  (C)abstract, this (D)  this, super

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A: The solution is given in the next step.

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A: The formula of permutation and combination. Crn=n!r!n-r!Prn=n!n-r!

Q: Show by contraposition that for any real number x if - 5 < x< 4 then x2+x – 20 < 0

A: For the solution follow the next step.

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A: Given, ∃x~Fx≡∀xGx We need to prove that, ∃x~Fx≡∀xGx⇒∀xFx∨∀xGx.

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A: Given that Q(x, y) be the statement                         x + y = x -y .

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Q: find a number that provides a counterexample to show that the given statement is false. 1. For all…

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A: Given

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Q: Show by contraposition that for any real number x if -5 <x<4 then x2+x- 20 <0

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A:

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A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

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Q: 1. Simplify the given Boolean expressions to a minimum number of literals a. (X + Y)' (X' + Y')

A: Let's find.

Q: Can I a-convert the expression (Ax.Ay.x y) y to (Ax.Ay.x y) z? Explain briefly why or why not.

A: To determine and explain: Whether the expression λx.λy.x y y can be α-converted to λx.λy.x y z.

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A: Answer:

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A: Thanks for the question :)And your upvote will be really appreciable ;)

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A: here given ,  there are 18 songs , from which 10 classical songs, and 8 jazz songs

Q: Let Q(x, y) be the statement “x + y = x - y." If the domain for both variables consists of all…

A: