Semiconductor Electronics Part 1

Consider the figure given in the question and solve it using Boolean identities.Now, put the value of A and B in the output, we get
Y=(0+1)(0+1) Y=1⋅1=0
Alternate method
We can directly put the given values in the logic circuit given in the question and can find its output. Let us consider the given logic circuit,The output is Y=0.1=0
∴ The value of x is 0 .