Question: Question 1 Justify (argue, prove, ...) that the following formula is valid x A(x) x B(x) x (A(x) B(x)) Question 2 Show that the following

Question 1
Justify (argue, prove, ...) that the following formula is valid
x A(x) x B(x) x (A(x) B(x))
Question 2
Show that the following formula is not valid (hint: write an interpretation that makes it false)
x (A(x) B(x)) x A(x) x B(x)

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