disjunctive normal form

Question

Comments

both ii and iii is the option have a look here....

https://en.wikipedia.org/wiki/Disjunctive_normal_form

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if f1 is a formula and f2 is a formula then f1∧f2 or f1vf2 or ~f1  is also a formula.
Answer should be ii and iii.

Answer 1

ii) right?

Comments

answer is 2,3

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3 is conjunction