A is a matrix of order m multiplied by N, B is a matrix of order n multiplied by M

A is a matrix of order m multiplied by N, B is a matrix of order n multiplied by M

The question should be like this
r(AB)

Calculation: A-1 / A & # 178; - 1 + A / A + 1; 1 / M & # 178; - M + M-3 / M & # 178; - 1

a-1/a²-1+a/a+1；
=（a-1）/(a+1)(a-1) + a/(a+1)
= 1/(a+1) + a/(a+1)
= （1+a）/(a+1)
=1
1/m²-m+m-3/m²-1.
=1/m(m-1) +(m-3)/(m+1)(m-1)
=(m+1+m^2 -3m)/m(m+1)(m-1)
=(m^2-2m+1)/m(m+1)(m-1)
=(m-1)^2/m(m+1)(m-1)
=(m-1)/m(m+1)
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Factorization of 4x square + 20x + 24

4X square + 20x + 24
=4(x^2+5x+6)
=4(x+3)(x+2)

Given the function f (x) = (4x & sup2; - 7) / (2-x), X ∈ [0,1]
(1) Finding monotone interval and range of F (x)
(2) Let a ≥ 1, the function g (x) = x & sup2; - 3A & sup2; x-2ax, X ∈ [0,1]. If for any X & # 8321; ∈ [0,1], there always exists x0 ∈ [0,1], such that G (x0) = f (X & # 8321;) holds, the value range of a is obtained

First, find the function f (x) = (4x & sup2; - 7) / (2-x) range - 4 to - 3, the problem is transformed into the interval - 4 to - 3, which is a subset of the range of the function g (x) = x & sup2; - 3A & sup2; x-2ax, the geometric function image, know as long as G (1) is satisfied

When k is a value, the negative K2 power of y = (k-1) x is an inverse proportional function

Y = (k-1) x ^ (- K & # 178;) inverse scale function
So - K & # 178; = - 1
So k = 1 or K = - 1
Because K ≠ 1
So k = - 1

It is known that a × 3 / 4 × B = 6 / 5 × C, and ABC is not equal to 0
ddd

There are several ways to read your title. Please write it clearly first

What is the solution set of inequality 4x minus 3 less than 2x plus 5?

6X + 15 = 39, 18-6 / 5x = 14

0.6x+15=39
0.6x=-15+39=24
x=40
18-6/5x=14
-6/5x=14-18=-4
5x=3/2
x=3/10
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The position relationship between the line 4x-3y-2 = 0 and the circle xsquare + ysquare - 6x + 10y-2 = 0 is

There is a formula to calculate the center coordinates of a circle according to the general formula of the circle: for the center coordinates (- D / 2, - E / 2) of the circle: x + y + DX + ey + F = 0, the radius is [√ d ^ 2 + e ^ 2-4f] * 1 / 2. So the center coordinates (3, - 5), the radius is 6. Then the distance from the center to the straight line 4x-3y-2 = 0 is 4 * 3-3 * (- 5) - 2 / [radical sign

How to use this rounding symbol, round up, round up or round down?

[x] denotes the largest integer not exceeding X
For example, [5.2] = 5, [- 3] = - 3