Question 1207571
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I'll provide an informal outline how the derivation will go.
I'll leave it up to the student to form the proper derivation in the format your teacher wants. 


We can pull out "not A" from the "Not A & Not C" by use of the <font color=red>simplification</font> rule.


Then combine "A or B" with "not A" to determine the conclusion is B.
This is because of the <font color=red>disjunctive syllogism</font> rule.


Please let me know if you have any further questions.
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