If A⊆B, then A\B is  ________

(a)

B

(b)

A

(c)

Ø

(d)

\(\frac{B}{A}\)

The shaded region in the adjoining diagram represents.

(a)

A\B

(b)

B\A

(c)

AΔB

(d)

A'

Which of the following is not an equivalence relation on z?

(a)

aRb ⇔ a+b is an even integer

(b)

aRb ⇔ a-b is an even integer

(c)

aRb ⇔ a

(d)

aRb ⇔ a=b

Let f : Z➝Z be given by f(x) = \(\begin{cases} \frac { x }{ 2 } \quad if\quad x\quad is\quad even \\ 0\quad if\quad x\quad is\quad odd \end{cases}\). Then f is __________

(a)

one-one but not onto

(b)

onto but not one-one

(c)

one-one and onto

(d)

neither one-one nor onto

Domain of the function \(y={x-1\over x+1}\) is __________

(a)

1R

(b)

Q

(c)

R-(-1)

(d)

R-1