When m is equal to what, the inequality mx5

When m is equal to what, the inequality mx5

The inequality can be transformed into M & lt; - (x2 + 4 / x), and when x belongs to (1,2), the value range of the formula - (x2 + 4 / x) is (- 5, - 4), note that - 5 is not taken
But M is smaller than all the values in (- 5, - 4), so the maximum value of M can be - 5

On the inequality MX ^ 2-mx + 3 of X, the solution set of which is less than or equal to 0 is an empty set, and the value range of M is obtained

Because the solution set is an empty set, then MX ^ 2-mx + 3 is less than or equal to 0 △ = B ^ 2-4ac

Let m (a, b) be in the system of inequalities X-Y + 6 > = 0, x + Y > = 0, X

First determine the plane area of M (a, b), and then determine the plane area of n (a + B, a-b) - it is a square with six root signs and two sides, so its area is 72
Can you identify the area? Can you draw your own map?