How will the solution of the system y > 2x + and y < 2x + change if the inequality sign on both inequalities is reversed to y < 2x + and y > 2x + ?
Answer:
The System of inequality is ,
1. y > 2 x + p
2. y < 2 x + p
Suppose we assign some values to p and q and draw its graph
And, then the inequality sign on both inequalities is reversed
3. y < 2 x + p
4. y > 2 x + p
And , then draw it's graph
it has been found that, the solution set of both the inequality remains same.That is there is no point or set of points , which satisfy both the system of inequality.
The system has no solution.
Answer:
The solution will not change.
Step-by-step explanation:
Let y > 2x + p and y < 2x + p,
Where, p is any constant,
∵ If we subtract any number on both sides of an equality, the sign of inequality does not change,
i.e. y - p > 2x and y - p < 2x
\(\implies \frac{y-p}{2} > x\text{ and }\frac{y-p}{2} < x\)
\(\implies x\in (-\infty, \frac{y-p}{2})\cap (\frac{y-p}{2}, \infty )-----(1)\)
Similarly, If the inequality is,
\(y < 2x + p\text{ and }y > 2x + p\)
\(\implies \frac{y-p}{2} < x\text{ and }\frac{y-p}{2} > x\)
\(\implies x\in (-\infty, \frac{y-p}{2})\cap (\frac{y-p}{2}, \infty )-----(2)\)
From equation (1) and (2),
It is clear that, the solution will not change after reversing the sign of inequality.