On the number axis, the distance between a point and 1 is 2, so what is the absolute value of the number corresponding to this point? And explain the reason

On the number axis, the distance between a point and 1 is 2, so what is the absolute value of the number corresponding to this point? And explain the reason

It could be 3 or 1, because there are two numbers at a distance from two points: 3 and - 1, and their absolute values are 3 and 1

It is known that the function y = (x) is a decreasing function on [0, + ∞], which is to compare the size of F (3 / 4) and f (a ^ 2-A + 1)
Step by step. Thx

a^2-a+1=(a-1/2)^2+3/4>=3/4
The function y = (x) is a decreasing function on [0, + ∞]
So f (3 / 4) > = f (a ^ 2-A + 1)

Please write a congeneric term of - 1 / 3 x & # 178; Y & # 178; Z, and combine them, the coefficient is one, the congeneric term is

1/3x²y²z

How to find this inverse function? -- f (x) = x + LNX, request f (x) inverse function

Remember:
Not every function has an inverse function
Not every function with an inverse function can explicitly express its inverse function

Given the function f (x) = ln (1 + e ^ x) + X, X belongs to R
Prove that f (x) increases monotonically on R by definition

Let X1 > x2
F(X1)-F(X2)=In[(1+e^x1)/(1+e^x2)]+x1-x2
x1>x2
x1-x2>0
[(1+e^x1)/(1+e^x2)>1
In[(1+e^x1)/(1+e^x2)]>0
f(x1)-f(x2)>0
F (x) increases monotonically on R

Find a function with limit but discontinuous at a

F (x) = SiNx / x, the limit of this function is 1 at 0, but there is no definition at this point. Of course, it is not continuous
Sports shoe store: Q 1054 7212 46
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If the square of matrix A is equal to a, can we deduce a = e

We can get that a is invertible because a & # 178; = A. then we can get the result a = e by multiplying the left side of a by the negative power of A

How can a noun ending in p be plural?

General + s, such as Stamp Stamps
The special image sheet sheet is invariant

In the pyramid p-abcd, PD ⊥ bottom ABCD, AB parallel CD, PD = CD = ad = 1 / 2Ab, angle ADC = 120 degrees
The angle formed by the straight lines AD and Pb on different planes is obtained
If the midpoint of AB is e, find the dihedral angle d-pc-e

(1) Using vector method ∠ ADC = 120 ° DC | ab | DAB = 60 ° ∵ CD = ad = 1 / 2Ab, e is the midpoint of ab ∵ de = ad = AE = CD = BC ∵ the bottom is isosceles trapezoid, DG ⊥ AE is established in G ∵ ad = de ∵ G is the midpoint of AE, D is the origin, DG is the x-axis, DC is the y-axis, DP is the z-axis, PD = Da = 1a (√ 3 / 2, - 1 / 2,0) P (0,1) B (√

English translation
demand for sb
be sure of sb
provide for sth
be aware of
take pride in
I was afraid of mentioning it to him

Ask for sb
Be sure of sb
For provide
know
Yes proud
I'm afraid he mentioned it