Prove using boolean algebra, Computer Engineering

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Q. Prove using Boolean Algebra

1. AB + AC + BC' = AC + BC'

2. (A+B+C) (A+B'+C') (A+B+C') (A+B'+C)=A

3. (A+B) (A'+B'+C) + AB = A+B

4. A'C + A'B + AB'C + BC = C + A'B


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