Chapter 12.2, Problem 9E

To determine

To show:

Boolean sum $y_1+y_2+\mathrm{.......}+y_n$ where $y_i=x_i\text{ or }{y}_i={\overline{x}}_i$ has the value $0$ for exactly one combination of the values of the variables namely when $x_i=0\text{ if }{y}_i=x_i$ and $x_i=1\text{ if }{y}_i={\overline{x}}_i$. This Boolean sum is called max term.