It is known that the solution of the equation 6m / 2 + 3x = 6 about X is the equation about X (see the supplement of the problem for the complete problem) It is known that the solution of the equation 6m / 2 + 3x = 6 about X is 11 times of the solution of the equation 2x / 3 + m minus 10x / 12 + 1 = 3x-4 about X. the value of M and the solution of the two equations are obtained

2 / 6m + 3x = 66m + 3x = 123x = 12-6mx = 4-2m3 / 2x + m minus 12 / 10x + 1 = 4 / 3x-14 (2x + m) - (10x + 1) = 3 (3x-1) 8x + 4m-10x-1-9x = - 3-11x = - 2-4mx = (2 + 4m) / 11

An equation with unknowns is called an equation______ &Nbsp; (& nbsp; judge right or wrong & nbsp;)

The equation with unknowns is an equation. It is wrong to judge that the equation with unknowns is an equation

Junior high school physics that kind of circuit diagram calculation problem how to do?

Set Ohm's law, set up equations, voltmeter has no current, ammeter has no resistance

Is the set symbol & _; = & _?

The two symbols are not equal
To the right of the equal sign is a subset
On the left side of the equal sign is the true subset, which means a subset
So they are not equal. Proper subsets are only part of subsets
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If △ ABC, BC = Ba, point D is on AB, and AC = CD = dB, calculate the degree of each angle of △ ABC

∵BC=BA∴∠BCA=∠A∵AC=CD=DB∴∠A=∠CDA，∠B=∠BCD∵∠CDA=∠B+∠BCD=2∠B∴∠A=2∠B∴∠BCA=2∠B∴∠DCA=∠B∵∠CDA+∠A+∠DCA=180°∴5∠B=180°∴∠B=36°∴∠BCA=72°，∠A=72°

It is proved that for any n-order matrix A, a + A ^ t is a confrontation matrix, and A-A ^ t is an antisymmetric matrix

The position relationship between line and circle in high school mathematics
a. BC is the three sides of a right triangle, where C is the hypotenuse, then the position relationship between the straight line ax + by + C = 0 and the circle (x-a) ^ 2 + (y-b) ^ 2 = 1 is

The distance between the center of the circle and the straight line is a ^ 2 + B ^ 2 + C / C = (C ^ 2 + C) / C = C + 1, which is greater than half longitude 1, so the straight line is separated from the circle

The square of X is multiplied by SiNx to find the definite integral on [- 1,1]

The indefinite integral of the square of x times SiNx is
-(x^2)cosx+2xsinx+2cosx+C
So the definite integral is 0
Of course, if the square of x times SiNx is an odd function, we can also get that it is 0 in the symmetric region [- 1,1]

The rank of multiplication of two matrices of the same rank remains unchanged? Why?

Who said that? That's the wrong conclusion
A =
1 0
0 0
B =
0 1
0 0
AB=0
It's done. Don't forget to take it

1、 As shown in the figure, a trapezoidal paddy field is 70 meters in bottom, 50 meters in height and 30 meters in top. The perimeter of a paddy field is 18 meters. What is its area?
2、 How many cubic decimeters of wood will be cut from a cubic block with an edge length of 6 decimeters into the largest cylindrical block?
OK, fast bonus points! The first question also needs, ER.. it's not 18 meters, it's 180 meters, it's wrong

Second question: cube volume = 216
Cylinder volume = 54 π≈ 169.56
Truncated area = cube volume cylinder volume ≈ 46.44