Math problems after the best answer, give a score of 1 3 to the formula.

1.Solution: If warehouse A has x tons of fertilizer, then warehouse B has (140-x) tons of fertilizer.

1/4x+1/5（140-x）=32

Solution x=80 140-x=140-80=60Answer: Warehouse A has 80 tons of fertilizer, and warehouse B has 60 tons of fertilizer.

3.Solution: 45 (1-20 100-11 20)=180 (sets) Answer: There are a total of 180 color TVs in the store.

1) Let A be x and B be y

then we get the system of equations:

x+y=140

1/4x+1/5y=32

Solution: x=80

y=602) (I'm not sure about this answer, so I won't write it...). But it should be possible to find it on the Internet...

3) There are a total of x units.

The equation can be obtained from the meaning of the question: 20%x+45+(11 20)*x=x (where * is the multiplier sign).

Solution: x=180

A and B two warehouses each have x, y tons of fertilizer.

x+y=140,1/4x+1/5y=32,x=80,y=602.In order to describe the position of the points on the earth, geographers established the concept of a graticule, in which the two points connecting the north and south are the meridians, and the coils perpendicular to it are the parallels.

3.There are a total of x sets of color TVs in the store, 20 0 0x+45+11 20x=x,x=180

1.Solution: If A has x tons, then B has 140-x tons.

1/4x+1/5（140-x）=32

Solve x2Latitude and longitude Latitude and longitude Latitude.

3.Solution: There are a total of x units.

20 100x+45=(1-11 20)x solves x

1 (1) 0 (2) 0 put n on the denominator infinitesimal is infinitesimal than infinity = 0 (3) 0 1 n is close to 0 n tends to infinity plus (-1) n is the swing close to 0

4) 1 n tends to infinity, finite numbers can be ignored (5) - infinity.

3 Bad input is the absolute value of the |xn-limit value |"Yu Pu Xi Long 1) solution n > (1-2 Yu) 4 Yu.

So take n=the value above.

Then n> n must be true |xn-3/2|"Epsilon 2) is solved n>-ln-ln-ln

So take n=[-ln-ln-ln2].

Then n> n must be true |xn-1|"Epsilon.

What do you do to determine whether a function is odd or even? It is necessary to determine whether the domain of his definition is symmetrical about the origin. Therefore, to know this problem, the first thing to do is to determine the symmetry of the definition domain with respect to the origin.

That is: -(a-3)=2a solution: a=1

So f(x)=x+bx+b+1

Then according to the definition of the even function: f(-x)=f(x) solution, after b=0, you must pay attention to determine the definition domain first, don't forget.

First of all, the even function must define domain symmetry, so a-3=-2a, that is, a=1, and in addition, it is an even function, and all odd powers of the function must be 0, so b must be 0, so a=1, b=0I hope I can be satisfied

f(x) is an even function, then there is f(x)=f(-x), i.e., ax 2+bx+2a+b=ax 2-bx+2a+b, and b=0

The domain of the even function is symmetric with respect to the y-axis, a-3=-2a is solved to get a=1

1.The volume of a cone is cubic meters, the diameter of the bottom surface is 6 meters, and its height is (3) meters.

2.The circumference of the bottom surface of a cylindrical piece of wood is 3m, and if it is divided into 3 small cylinders on average, the surface area increases by (256 = ) square decimeters, and the volume of each small cylinder is (640 = cubic decimeters).

3.An isosceles right-angled triangle, 3 meters high, the lower one (should be the bottom surface) 3 meters, rotate around with one of its right-angled sides as the axis, and get a three-dimensional figure, how many cubic meters is the volume of this three-dimensional figure?

The title is not clear, how is the isosceles right triangle placed?

Does 3 meters high refer to the height on a right-angled edge or on a hypotenuse?

What does the 3 meters below (which should be the bottom) mean?

4.A part, diameter, 1mm high, drawn on the drawing its diameter is, what is the scale of this drawing, what is the volume of this part in cubic millimeters?

The scale is: 1 = 1:1 30

In terms of volume, what is the shape of this part with skin?

If it is cylindrical, v=

If it is conical, v=