An odd function f (x) = f (x-2k) (k belongs to Z) with the domain of R. when x belongs to (0,1), f (x) = 2 ^ X / (4 ^ x + 1) find the analytic expression of F (x) on [- 1,1]

An odd function f (x) = f (x-2k) (k belongs to Z) with the domain of R. when x belongs to (0,1), f (x) = 2 ^ X / (4 ^ x + 1) find the analytic expression of F (x) on [- 1,1]

-1

If the definition field of odd function f (x) is (k, 2K + 3), then the decreasing interval of function g (x) = (K + 2) x ^ 2 + (k-1) x + 3 is

The domain of odd functions is symmetric about the origin, k = - (2k + 3), k = - 1
g（x）=x^2-2x+3=（x-1）^2+2
Minus interval (- infinite, 1)

An odd function f (x) defined on the interval [- 2,2], whose image on the interval (0,2) is a line segment (without point (0,1)), as shown in the figure,
Then the solution set of the inequality f (x) - f (- x) ≥ - 1 is___________

[-2,-1]∪（0,2]
There is no guarantee for this answer. I just made it myself
There are those who know the answer, have a look!

If f (x) is an odd function defined in the interval (- 2,2) and decreases in the interval (0,2), then f (x) - f (- x) > the solution set of X

F (x) is an odd function defined in the interval (- 2,2). If f (x) decreases in the interval (- 0,2), we can get that f (x) decreases between (- 2,2). F (x) - f (- x) > x = = > F (x) + F (x) > x = = > F (x) > x / 2. Since f (x) is an odd function, f (0) = 0, y = f (x) passes through (0,0)

How to get the power of diesel engine
Let's say an example: for a four stroke diesel engine, its speed is 800r / min, and its power stroke is 1500j. What is the power of this diesel engine?

Pe=C•pe•n•i=pe•Vh•n•i•m÷60000=π÷8000×(vm•D²•i•m•pe)

Proof: A & # 178; + B & # 178; + 3 ≥ AB + √ 3 * (a + b)

If the rated voltage of a DC motor is u, the rated power is p, and the internal resistance of the motor is r, then its current intensity in normal operation is
A. Equal to U / R B. greater than u / R C. equal to P / u D. greater than P / u
Why are the other options wrong,
Back to the first floor: Well, I can't figure out why other answers are wrong

Because it is not a pure resistance circuit, AB is excluded. It not only produces heat, but also does external work. Only a pure resistance circuit is suitable for I = u / R, and P = UI is his definition, so D is wrong in any case

The height of the street lamp from the ground is h, the height of a person is l, and the speed of uniform movement is v

Head V H / (H-L)
Length growth V L (H-L)

What are the main units of current, voltage, resistance, energy and power in the international system of units?

Current: a (PA)
Voltage: v v (T)
Resistance: Ω Ω (m)
Electric energy: J joules (ear)
Electric power: w w (T)
(the man in brackets can be omitted)

As shown in the figure, M1 = 1kg, M2 = 2kg, the maximum static friction between a and B is 5N, and the horizontal plane is smooth
When the tensile force is f = 20n, what is the acceleration of B?

First of all, let's analyze the maximum acceleration for a and B to move together. If you don't have a graph, I suppose a is above B: the maximum acceleration of a is f = m1a1, A1 = 5, then the maximum acceleration of AB body is also a = A1 = 5, f = (M1 + m2) A1 = 15 (this is the critical point). When f = 10, it doesn't reach the critical point, so AB moves together, a = 10 / 3 when f = 20, super