19) Determine whether the following equations are valid. Check your answer with truth table. c. (x1+x3)(x1...

 

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19) Determine whether the following equations are valid. Check your answer with truth table. c. (x1+x3)(x1 + x2 + 3)(X1 + x2) = (x1 + x2)(x2 + 3)(x1 + x3) 20) Redraw the following schematic regarding the other side of DeMorgan's theorem (AB = A + B). A B A. B 19) Determine whether the following equations are valid. Check your answer with truth table. c. (x1+x3)(x1 + x2 + 3)(X1 + x2) = (x1 + x2)(x2 + 3)(x1 + x3) 20) Redraw the following schematic regarding the other side of DeMorgan's theorem (AB = A + B). A B A. B