MCQ
If x > 7 then -x > -7 is, ___________?
- Apossible
- Bcertainly false
- Ccertainly true
- Ddepend on x
✓
Answer
- certainly false
Solution:
If we multiply by negative number on both sides of inequality then,
sign of inequality will change i.e. if x > 7 then (-1) x < (-1)7 ⇒ -x < -7.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The distance between the points (a, b) and (-1, -b) is:
Choose the correct answer.
→If
$\sin\theta+\text{cosec}\theta=2,$ then $\sin^2\theta+\text{cosec}^2\theta$ is equal to:Choose the correct answer.
If $\tan\text{A}=\frac{1}{2},\tan\text{B}=\frac{1}{3},$ then $\tan(2\text{A + B})$ is equal to:
→If $\tan\text{A}=\frac{1}{2},\tan\text{B}=\frac{1}{3},$ then $\tan(2\text{A + B})$ is equal to:
What is the standard deviation of the data $6,10,4,7$, 4 and $5?$
→The amplitude of $\frac{1}{\text{i}}$ is equal to:
→- 0
- $\frac{\pi}{2}$
- $-\frac{\pi}{2}$
- $\pi$
The sum of the series $\frac{1}{\log_24}+\frac{1}{\log_44}+\frac{1}{\log_84}+\ ...\ +\frac{1}{\log_2{^\text{n}4}}\text{ is}:$
→- $\frac{\text{n}(\text{n}+1)}{2}$
- $\frac{\text{n}(\text{n}+1)(2\text{n}+1)}{12}$
- $\frac{\text{n}(\text{n}+1)}{4}$
- none of these.
The coordinates of a point which divides the line joining the points P(2, 3, 1) and Q(5, 0, 4) in the ratio 1 : 2 are:
If the vertices of a triangle are (2, -2), (-1, -1) and (5, 2) then the equation of its circumcircle is:
$\text{If }\text{A},\text{B},\text{C}\text{ are in }\text{A}.\text{P.},\text{than}\frac{\sin\text{A}-\sin\text{C}}{\cos\text{C}-\cos\text{A}}=$
→- $\tan\text{B}$
- $\cot\text{B}$
- $\tan2\text{B}$
- None of these
The inequality representing the following graph is:
