Function image about axisymmetry I'd like to know about the axis symmetry of the function image and how to see it For example, f (x) = 2x ^ 2 + 4 about which axis is symmetric. What about other functions?

First of all, if it is a function, it can only be about Y-axis symmetry or a line that is not y = 0. Because the function requires 1-to-1 or many-to-1, it can not be about X-axis symmetry. Now let's talk about what kind of function is about Y-axis symmetry, that is, if the domain of function definition is about

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1. Can the image of a function be symmetric about the X axis The difference between a function and a mapping is that a function requires an independent variable to have only one dependent variable corresponding to it, so can the function image not be symmetrical about the X axis
2. If the image of the function f (x) = (x-2a) (x + A ^ 2) is symmetric about the Y axis, then a =?
3. The abscissa of points a and B are a and B (a ＞ 0, B ＞ 0) on the image of the first-order function y = x and y = 8x respectively. If the line AB is the image of the first-order function y = KX + m, when Ba is an integer? Find the value of integer k satisfying the condition
4. The function of the image of function y = 2 ^ x with respect to the image of x-axis symmetry is
5. If the image of function y = f (x + 2) passes through the point (- 1,3), then the image of function f (x) must pass through the point with respect to the image of y-axis symmetry A（1,-3） B（-1,3） C（-3,-3） D（-3,3）
6. What is the function f (x) = loga (x-a) about X-axis symmetry
7. For the function y = f (x), X ∈ R, "the image of y = | f (x) | is symmetric about the Y axis" is the () A. Sufficient and unnecessary condition B. necessary and insufficient condition C. sufficient and necessary condition D. neither sufficient nor necessary condition
8. If the function y = SiNx + √ 3cosx, one axis of symmetry of the image is
9. What is the equation of the symmetry axis of the image with the function y = SiNx?
10. How many axes of symmetry of inverse scale function?
11. For example, what kind of power function is the figure of eight character function with Y-axis symmetry
12. All the basic formulas and derived formulas of high school physics acceleration
13. For an elastic rope placed horizontally, the right end o vibrates in the vertical direction with a period of 0.4s. If t = 0, the right end starts to vibrate upward. Please draw the waveform on the rope when t = 0.5s
14. A problem of simple harmonic motion in high school physics A. B is a spring ballast composed of two objects. In the process of vibration, a and B always keep relatively static. A is placed on B, and the spring is connected to B. why is the image of the relationship between the friction force F on a and the displacement X of the ballast y = - x? Here I know that the friction force is the restoring force of a, but don't the displacement and restoring force change in the same direction? Why isn't their relationship image y = x?
15. Simple harmonic motion The acceleration of gravity in Beijing is 9.8012 meters per second. What's the length of the second pendulum in Beijing According to the formula, we need to know the period to get the pendulum length The title does not give a period How should I ask for it
16. Put a spring on the ground. Now put a small ball on the spring lightly. At this time, the spring will compress. When the elastic force equals the gravity of the small ball, will the small ball still press down? After reaching the lowest point, will the point where the elastic force equals the gravity be taken as the equilibrium position to make a simple harmonic motion? Why not do simple harmonic motion?
17. Harmonic motion The cube block with mass m and side area s is placed on the water surface at rest. Force F to press it into the water for a certain depth, and then remove the external force. The block moves up and down on the water surface. Is the vibration of the block a simple harmonic motion? Give reasons,
18. It's a sentence I saw when I was talking about simple pendulum "When the amplitude is small, the period is independent of the amplitude." I feel that this sentence is very confusing. When is the period related to amplitude,
19. Physical periodic harmonic motion in grade one of senior high school For a spring oscillator, the velocity at t is V, the velocity at t is V, and the direction is the same A. It could be more than a quarter of a cycle B. It could be less than a quarter of a cycle C. It must be less than half a period D. Probably equal to half a cycle Please explain the solution carefully, thank you
20. What is the period of simple harmonic motion related to