JEE Main 202312 AprilMorning Shift
- Exam
- JEE Main
- Year
- 2023
- Date
- 12 April
- Shift
- Morning Shift
- Subject
- Mathematics
- Chapter
- Mathematical Reasoning
JEE Main 2023 · 12 April · Morning Shift · Mathematics · Mathematical Reasoning
Among the two statements ( S _ 1 ): (p ⇒ q) ∧ (p ∧ (~ q)) is a...
Among the two statements
is a contradiction and \left({S}_{2}\right): is a tautology
Options
- Aonly is true
- Bonly is true
- Cboth are false
- Dboth are true
Correct answer
D. both are true
Step-by-step solution
Given,
\left({S}_{2}\right): \left(p ∧ q\right) ∨ \left(\left(~ p\right) ∧ q\right) ∨ \left(p ∧ \left(~ q\right)\right) ∨ \left(\left(~ p\right) ∧ \left(~ q\right)\right)≡ \left(p ∧ q\right) ∨ \left(~ p ∧ q\right) ∨ \left(p ∧ ~ q\right) ∨ \left(~ p ∧ ~ q\right)≡ \left(\left(p ∨ ~ p\right) ∧ q\right) ∨ \left(\left(p ∨ ~ p\right) ∧ ~ q\right)≡ \left(t ∧ q\right) ∨ \left(t ∧ ~ q\right) ≡ q ∨ ~ q ≡ t$
Hence, both statement are true.