if A denotes"has a computer/mobile" and B denotes "uses e-mail", then express the following symbolic form in statement:1. B=>A 2. -B=>-A
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Explanation:
if A denotes"has a computer/mobile" and B denotes "uses e-mail", then express the following symbolic form in statement:1. B=>A 2. -B=>-A
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1. If a person uses e-mail, it is true that he has a computer/mobile.
2. If a person doesn't use e-mail, it implies that person does not have a mobile/computer.
- "=>" sign is the implication sign and "-" is negation sign.
- It means that if condition on left side of "=>" holds true then it implies that right side also holds true.
- We are given A denotes "has a computer/mobile."
- We are given B denotes "uses e-mail"
- ∴ B => A means that is a person uses e-mail it implies that he has a computer or a mobile.
- -B=>-A means negation of B implies a negation of A.
- It means that if statement B is false, statement A will also be false.
- It means that if a person does not use e-mail, it implies that he doesn't have a mobile/computer.
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