truth table help

[LKS007]

last sem kale mathaka nane lol

1) P V (Q -> R)=true 2) Q^~R =true

take 1
P V (Q -> R)=true
But (Q -> R) = ¬Q V R
so 1 is

P V ¬Q V R
Law of negation
¬¬(P V ¬Q V R)
¬(¬P ^ ¬¬Q ^ ¬R)
¬(¬P ^ Q ^ ¬R)
from 2 Q^~R =true
¬(¬P ^ Q ^ ¬R)
¬(¬P ^ true)
identity law (P ^true)=P
¬(¬P)
P

මේක තේරෙන්න දාපන් යක්ක්