It is known that f (x) is an odd function defined on R and a periodic function with period 3. When x belongs to (0,2], f (x) = 2 ^ X-1, then the value of F (log0.524) is a.3/2 b.4 C. - 1 / 2 d. - 2 why

It is known that f (x) is an odd function defined on R and a periodic function with period 3. When x belongs to (0,2], f (x) = 2 ^ X-1, then the value of F (log0.524) is a.3/2 b.4 C. - 1 / 2 d. - 2 why

∵16

Use a piece of paper 8 decimeters long and 6 decimeters wide to cut the largest circle. The area of the circle is______ The circumference is______ ．

3.14 × (62) 2 = 3.14 × 9 = 28.26 (square decimeter); 3.14 × 6 = 18.84 (decimeter); answer: the area of this circle is 28.26 square decimeter, the perimeter is 18.84 decimeter, so the answer is: 28.26 square decimeter, 18.84 decimeter

Let X and y be integers in the interval [2100], and prove that there is a positive integer n such that x ^ 2 ^ n + y ^ 2 ^ n is a composite number

Guo dunyao replied: ∵ x, y are integers in the interval [2100]. Let X and y be odd numbers in the interval [2100], then x ^ 2 ^ n and Y ^ 2 ^ n are odd numbers, ∵ 2 ^ 2n = 2n, ∵ 2 | 2n, that is, 2n is even number, ∵ 2n is composite number, ∵ there is a positive integer n, so that x ^ 2 ^ n + y ^ 2 ^ n is composite number

Mathematics examination paper, a little sloppy. The teacher asked our parents to sign at least 50 words, how to write?
This score is really a little low for me. I didn't expect it

The child's grades this time (write according to the situation), in view of the examination results, I also have a general understanding of the children's learning situation during this period. I will actively cooperate with the teachers in the future, and give full attention to the weak subjects of the children. I also want to thank the teachers for their efforts, and hope you are good! Just personal understanding, the specific contents are as follows:
1. Thanks for the help and care of children's teachers for many years;
2. The children's recent performance in the family (that is, their life and learning situation);
3. According to the content of the test or the object to be signed, compare the content to illustrate the reasons for children's progress or mistakes (this is the key point);
4. Finally, how to cooperate with teachers to help children grow up together!
Hope to communicate more in the future! Hope the children can get something

As shown in the figure below, there are two cylinders with a surface area of 90 square percent and a bottom area of 15m. How many cm is the surface area of connecting the two cylinders to form a large cylinder

Sorry, I can't see the picture
Connecting the two cylinders to form a large cylinder, the surface area was reduced by two bottom areas
Surface area = 90 × 2-15 × 2 = 150 square centimeter

If the speed of light is 300000 kilometers per second, how many meters is a light year?

Light speed = 300000 km / s light year = 300000 * 365 * 24 * 3600 = 9460800000000 (km)

Physics, about the balance of two forces
When an object is moving in a straight line at a constant speed and is suddenly subjected to an external force, will its state of motion change? Why?

If an object is moving at a constant speed in a straight line, it will be affected by the balance force. If an external force is applied, it will not be affected by the balance force now. Therefore, to change the current state of motion, the type of motion depends on the direction of the force. If the direction of the force is the same as that of the original motion, it will be accelerated uniformly in a straight line. If the direction of the force is opposite, it will be decelerated uniformly in a straight line. If the motion is at a certain angle, it will be curved

The perimeter of a rectangle is 24cm. If the length of the rectangle is reduced by 2cm and the width is increased by 3cm, it will become a square. How about the area of the original rectangle?

The original length is 2 + 3 = cm
So the original length = (24 △ 2 + 5) △ 2 = 8.5cm
Width = 24 △ 2-8.5 = 3.5cm
So the area of the original rectangle is 8.5 × 3.5 = 29.75 square centimeters

0.11 + 0.12 + 0.13.0.180.19 = is there any way to calculate how much?

0.11+0.19=0.3
0.12+0.18=0.3
.
0.14+0.16=0.3
0.3+0.3+0.3+0.3+0.15=1.2+0

Given that the function y = loga ^ 2 (x ^ 2-2ax-3) is an increasing function on (- 00, - 2), find the value range of A

Loga ^ 2 (x ^ 2-2ax-3) let (x ^ 2-2ax-3) = t, then loga ^ 2 (T) is an increasing function when a belongs to (- infinity, - 1) ∵ then x ^ 2-2ax-3 cannot be an increasing function on (- infinity, - 2) ∵ a belongs to (- Infinity, - 1) does not hold, similarly, when a belongs to (1, + infinity) does not hold, when - 1 < a < 0, l