Proposition r: If Febi sends a birthday greeting to Bintang, then Bintang will invite her to his birthday party. a. Write the proposition r using propositional variables and logical operators. b. Write the negation of the proposition r (as state in a). c. Write the negation of the proposition r in English.

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please solve question A until D

Proposition r: If Febi sends a birthday greeting to Bintang, then Bintang will
invite her to his birthday party.
a. Write the proposition r using propositional variables and logical operators.
b. Write the negation of the proposition r (as state in a).
c. Write the negation of the proposition r in English.
d. Bintang invites Febi. Conclusion: She sent a birthday greeting to him.
Is the argument valid or invalid? Give your reason
Transcribed Image Text:Proposition r: If Febi sends a birthday greeting to Bintang, then Bintang will invite her to his birthday party. a. Write the proposition r using propositional variables and logical operators. b. Write the negation of the proposition r (as state in a). c. Write the negation of the proposition r in English. d. Bintang invites Febi. Conclusion: She sent a birthday greeting to him. Is the argument valid or invalid? Give your reason
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