(a) We must prove the following expression that if A |=taut B and C |=taut D then A ∨ C |=taut B ∨ D. (b) Show that the formulas A ≡ ⊥ and ¬A are tautologically equivalent?

(-5,-28)

i graphed to on desmos.

b

step-by-step explanation:

it have 5 sides and 5 identicle angle.the rest does not have the same property as b.

brainliest

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