JEE Main 202229 JulyEvening Shift
- Exam
- JEE Main
- Year
- 2022
- Date
- 29 July
- Shift
- Evening Shift
- Subject
- Mathematics
- Chapter
- Mathematical Reasoning
JEE Main 2022 · 29 July · Evening Shift · Mathematics · Mathematical Reasoning
The statement (p ⇒ q) ∨ (p ⇒ r) is NOT equivalent to:
The statement
Options
- A
- B
- C
- D
Correct answer
B.
Step-by-step solution
Given,
the formula A ⇒ B ≡ ~ A ∨ B
We get, \left(~ p ∨ q\right)
≡ p ⇒ \left(q ∨ r\right)C1 ⇒ q≡ ~ \left(p ∧ ~ r\right)
∨ q≡ ~ p ∨ \left(r ∨ q\right)≡ \left(~ p ∨ r\right) ∨ \left(~ p ∨ q\right)
∨ \left(p ⇒ r\right)14 ⇒ r≡ ~ \left(p ∧ ~ q\right)
∨ r≡ ~ p ∨ \left(q ∨ r\right)≡ \left(~ p ∨ q\right) ∨ \left(~ p ∨ r\right)
∨ \left(p ⇒ r\right)4B is only wrong.