Solution to a:
Q(1,1)
since x+y is not equal to x-y, the truth value of Q(x,y) is FALSE
Ans: FALSE
Solution to b:
Q(2,0)
since x+y=x-y, the truth value of Q(x,y) is TRUE.
Ans: TRUE
Solution to c:
let y=1;
since for which x+y is not equal to x-y (e.g y=1), the truth value of Q(x,y) is FALSE.
Ans: FALSE
Solution to d:
since the above equation does not give a definite solution of x, the truth value of Q(x,y) is FALSE.
Ans: FALSE
Solution to e:
let x=2, y=0;
since and such that x+y=x-y (i.e x=2, y=0), the truth value of Q(x,y) is TRUE.
Ans: TRUE
Solution to f:
let x=1,y=1;
since x+y is not equal x-y when x=1 and y=1, the truth value of Q(x,y) is FALSE
Ans: FALSE
Solution to g:
when y=0;
since x+y=x-y for all x when y=0, the truth value of Q(x,y) is TRUE
Ans: TRUE
Solution to h:
let y=1;
since the above equation does not give a definite solution of x, the truth value of Q(x,y) is FALSE.
Ans: FALSE
Solution to i:
let x=1, y=1;
since x+y is not equal to x-y, the truth value of Q(x,y) is FALSE
Ans: FALSE
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