Determine Whether the Following Symbolized Argument Is Valid or Invalid $\rarr$

question 3

Short Answer

Determine whether the following symbolized argument is valid or invalid.If invalid,provide a counterexample;if valid,construct a deduction.
P $\rarr$ (Q v R)
~S v ~T
(Q v R) $\rarr$ (S & T)/ $\therefore$ ~P

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