Question
For any two sets A and B, prove that
$(\text{A}\cap\text{B})-\text{B = A}- \text{B}$

Answer

$\text{(A} \cup\text{B) – B = (A} - \text{B)}\cup\text{(A} - \text{B)}$
$= \oint\cap \text{ (A} - \text{B)}$
$= \text{A} - \text{B}.$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Prove the following identities:
$\frac{2\sin\text{x}\cos\text{x}-\cos\text{x}}{1-\sin\text{x}+\sin^2\text{x}-\cos^2\text{x}}=\cot\text{x}$
If for $\text{f}(\text{x})=\lambda\text{x}^2+\mu\text{x}+12,\text{f}'(\text{x})=15$ and $\text{f}'(\text{2})=11,$ then find $\lambda$and $\mu.$
If $\theta$ is the angle which the straight line joining the points $\left(x_1, y_1\right)$ and $\left(x_2, y_2\right)$ subtends at the origin, prove that $\tan\theta=\frac{\text{x}_2\text{y}_1-\text{x}_1\text{y}_2}{\text{x}_1\text{x}_2+\text{y}_1\text{y}_2}$ and $\cos\theta=\frac{\text{x}_1\text{x}_2+\text{y}_1\text{y}_2}{\sqrt{\text{x}_1^2+\text{y}_1^2}\sqrt{\text{x}_2^2+\text{y}_2^2}}$
Find the $4^{th}$​​​​​​​ term from the end of the G.P. $\frac12,\frac16,\frac{1}{18}\frac{1}{54},\ \dots,\ \frac{1}{4374}.$
Sketch the graphs of the following functions:
$\text{f(x)}=\cot^2\text{x}$
Sketch the graphs of the following functions:
$\text{f(x)}=\cot\frac{\pi\text{x}}{2}$
Prove that:
$\frac{\sin11\text{A}\sin\text{A}+\sin7\text{A}\sin3\text{A}}{\cos11\text{A}\sin\text{A}+\cos7\text{A}\sin3\text{A}}=\tan8\text{A}$
The mean and standard deviation of a group of $100$ observation were found to be $20$ and $3$ respectively. Later on it was found that three observations were incorrect, which were recorded as $21, 21$ and $18$. Find the mean and standard deviation if the incorrect observations are omitted.
In a survey of 60 people, it was found that 25 people read newspaper H, 26 read newspaper T, 26 read newspaper I, 9 read both H and I, 11 read both H and T, 8 read both T and I, 3 read all three newspapers. Find:
The number of people who read at least one of the newspapers.
Let A = {1, 2}, B = {1, 2, 3, 4}, C = {5, 6} and D = {5, 6, 7, 8}. Verify that:
$\text{A}\times\text{C}\subset\text{B}\times\text{D}$