What are the common biological characteristics

What are the common biological characteristics

The basic characteristics of living things: 1. Living things have the same material and structural basis. 2. Living things have metabolism. 3. Living things can respond to the stimulation of external things stress. 4. Living things can grow, reproduce and develop. 5. Living things have the characteristics of heredity and variation. 6. Living things can adapt to and affect the environment

What is the meaning of "space attribute" in architectural analysis drawing? The general explanation will have: density, tension, relaxation, rich levels, clear black and white and other words. Does it mean daylighting? Or something else? Thank you!

My general understanding refers to the distribution in three directions. It can refer to the space between the front and back buildings, the Bay and depth of the house, the division of the house in the height direction, whether there is a sense of hierarchy, etc. for reference

The image of the function f (x) = 2cos (x + π / 3) is translated according to the vector a = (- π / 6,1), and the analytic expression of the function image is
A.y=-2sinX+1 b.y=2sinX+1 C.y=-2sinX-1 D.Y=2cos(x+π/6)+1

1. Let f (x) = y, i.e. y = cos (x + π / 3) 2. According to the translation coordinate formula: X '= x + H, y' = y + K, after the image is moved, then x = x '- H, y = y' - K, X = x '+ π / 6, y = y' - 1 is brought in

Given that the function f (x) satisfies f (2 + x) + F (6-x) = 0, after translating the image of F (x) according to a, the image g (x) = 2 + X + sin (x + 1) is obtained, and the coordinates of a are obtained

∵ the function f (x) satisfies f (2 + x) + F (6-x) = 0, that is, f (2 + x) = - f (6-x), let t = 2 + X, f (T) = - f (8-t) ∵ f (T + 4) = - f (4-T), that is, f (4 + T) = - f (4-T), so y = f (T) is symmetric about (4,0), that is, y = f (x) is symmetric about (4,0), G (x) = 2

How does the function f (x) translate along the vector?
For example, how to translate f (x) = sin (2x) along vector (2,4)? It is best to have a process

Point to right and move up 2 4, X moves left 2, y moves up 4, left minus right plus up minus down plus y-4 = sin2 (X-2)

Let K ∈ R, of the following vectors, the vector which is not necessarily parallel to the vector q = (1, - 1) is ()
A. b＝(k，k)B. c＝(−k，−k)C. d＝(k2+1，k2+1)D. e＝(k2−1，k2−1)

∵ Q · d = - (K2 + 1) - (K2 + 1) = - 2k2-2 ≤ - 2 ∵ these two vectors must not be parallel, so C

After a function image is translated according to vector a (- П / 4, - 2), the analytic expression of image function is y = sin (x + П / 4) - 2, and the original function image is obtained

Translation according to vector a (- П / 4, - 2)
It's going to be left / 4, down 2
So just move y = sin (x + П / 4) - 2 to the right and 2 to the top
y=sin(x+П/4-П/4)-2+2
=sinx

Let's have two vectors, a and B respectively
There are | a | - | B||

If this formula is not easy to understand, draw it on the number axis, and take the absolute value as the length. It seems that what you said above is not very accurate: if a and B have the same sign, then A-B in the absolute value is equal to the left limit, otherwise, a + B in the absolute value of a and B with the same sign is equal to the right limit, and vice versa, As for the special case of zero vector, if one is zero vector, then both are equal

The unit vector in the same direction as the vector a = (3,3) is
The answer is (root 2 / 2, root 2 / 2)
I can't understand why this is the answer. Doesn't unit vector mean unit length?
Unit length is not 1

This question is about the unit vector!
If you are (1,1), your so-called unit vector is √ 2?
The answer is (root 2 / 2, root 2 / 2)
(√ 2 / 2) & sup2; + (√ 2 / 2) & sup2; = 1 should be able to see it!

Vector translation in Higher Vocational Mathematics
If the function y = x ^ 2 + 2, X belongs to the image l of R is translated to L1 according to the vector a = (- 3,1), then the analytic expression of the function corresponding to the image L1 is?
Also, I would like to ask what is a relatively simple way to do this kind of problem?

If the function y = x ^ 2 + 2, X belongs to the image l of R is translated to L1 according to the vector a = (- 3,1), then the analytic expression of the function corresponding to the image L1 is y = (x + 3) ^ 2 + 1 + 1
Simplification
y=x^2+6x+11
Take a look at Article 69 of this article: some conclusions of "translation by vector"