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Solving inequality x + 2 / AX-1 > 0
(x + 2) / (AX-1) > 0
When a ＞ 0, both sides multiply by a:
(x+2)/(x-1/a)>0
X ＜ - 2, or X ＞ 1 / A
When - 1 / 2 ＜ a ＜ 0, both sides multiply by a:
(x+2)/(x-1/a)＜0
1/a ＜ x ＜-2
When a = - 1 / 2, the inequality has no solution
When a ＜ - 1 / 2, both sides multiply by a:
(x+2)/(x-1/a)＜0
-2 ＜ x ＜1/a
Solve the following inequality: (1) 2 times the square of X + 5x-3 > 0. (2) 2 + the square of X-X
Solution 1
2x^2+5x-3>0
(2x-1) (x + 3) > 0
The solution is x > 1 / 2 or X
A car consumes three quarters of a liter of fuel per 3000 meters per row. How many kilometers per liter of gasoline is feasible? How many liters per kilometer per row?
3 / 2 △ 3 / 25 = 3 / 2 × 25 / 3 = 12.5km
3 / 25 △ 3 / 2 = 2 / 25 liters
If two angles are adjacent complements, then (four)
In the same plane
Two corners
adjacent
The sum is 180 degrees
Let f (z) = u (x, y) + IV (x, y) be the analytic function of Z = x + iy. Let u (x, y) - V (x, y) = x + y find f (z)
Let f (z) = u (z) = u + IV be an analytic function, and let f (z) be an analytic function, let \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\/ 2) (x ^ 2 + 2ixy -...)
When a piece of ice with a mass of 100g melts into water, its mass ()
A. Still 100GB. More than 100gc. Less than 100gd. Unable to judge
The mass of 100g ice is still 100g after melting into water, the state changes, and the matter remains unchanged
Newton's law of motion should be more complete, and so should the formula
Newton's first law (the law of inertia): all objects in the action of no external force, always maintain a uniform linear motion state or static state, until there is an external force to force it to change this state so far. It defines the relationship between force and motion and puts forward the concept of inertia. Newton's second law the acceleration of an object is consistent with that of the object
Let 2 / 3 of loga be less than 1 (0 < a < 1), then a = log0.56.7 power, B = log24.3 power, C = log25.6 power, then a, B
I know B ＞ C, I don't know how a and B see that both are greater than 1. Thank you for the process of solving these two problems
a=log1/2(6.7)^2=2log1/2(6.7)
b=log2(4.3)^2=2log2(4.3)
c=log2(5.6)^2=2log2(5.6)
Obviously, BB > 0
When the base is greater than 1, the larger the index is, the larger the result is, which is obviously 5.6 > 4.3
For a, 4
15.36 degrees = 15 degrees, minutes and seconds?
0.36 degrees * 60 * 60 = 1296 seconds
How many 60 in 1296? How many others?
1296-60*21=36
So 15.36 degrees = = 15 degrees, 21 minutes, 36 seconds
Even and odd numbers within 100
Even number: 2 4 6 8 10 12 14 16 18 20. (n + 2)
Odd number: 1 3 5 7 9 11 13 15 17. (x + 2)
N is 2
X is 1
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