Question: Show that if and are formulas, x is a variable such that x ! infree ( ) , and Q is a quantifier, that (

Show that if and are formulas, x is a variable such that x!infree(), and Q is a quantifier, that (vvQx)-=Qx(vv). This finishes Lemma 54.
Show that if and are formulas, x is a variable such

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