. Prove {A} (-B → A) → B in H. Note: In addition to the axioms and rule of inference of H, you may use any of the derived rules and/or theorems 3.20-3.30 (as numbered in the textbook).

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Chapter2: Second-order Linear Odes
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4. Prove {A} (-B → A) → B in H. Note: In addition to the axioms and rule of inference
of H, you may use any of the derived rules and/or theorems 3.20-3.30 (as numbered in the
textbook).
Transcribed Image Text:4. Prove {A} (-B → A) → B in H. Note: In addition to the axioms and rule of inference of H, you may use any of the derived rules and/or theorems 3.20-3.30 (as numbered in the textbook).
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