MCQ
If $A, B$ and $C$ are any three sets, then $A -(B \cup C)$ is equal to
- A$(A -B) \cup (A -C)$
- ✓$(A -B) \cap (A -C)$
- C$(A -B) \cup C$
- D$(A -B) \cap C$
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($A$) the circle with radius $\frac{1}{2 a}$ and centre $\left(\frac{1}{2 a}, 0\right)$ for $a>0, b \neq 0$
($B$) the circle with radius $-\frac{1}{2 a}$ and centre $\left(-\frac{1}{2 a}, 0\right)$ for $a<0, b ; 0$
($C$) the $x$-axis for $a \neq 0, b=0$
($D$) the $y$-axis for $a=0, b \neq 0$