Use conditional proof or indirect proof and the eighteen rules of inference to establish the truth of the following tautologies. P â£[P V(Q . ~ Q)]

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.