On the number axis, point a stands for negative 6, and point B stands for positive 4. Please divide line AB into five equal parts, and the point is cdef from left to right. Write down the numbers they represent

On the number axis, point a stands for negative 6, and point B stands for positive 4. Please divide line AB into five equal parts, and the point is cdef from left to right. Write down the numbers they represent

-4,-2,0,2
-4 -2 0 2
As shown in the figure, ab = 2 (unit length), CD = 4 (unit length) on the number axis as shown in the figure, ab = 2 (unit length), CD = 4 (unit length) on the number axis,
As shown in the figure, on the number axis, line AB = 2 (unit length), CD = 4 (unit length), the number represented by point a on the number axis is - 10, and the number represented by point C on the number axis is 16. If line AB moves uniformly to the right at the speed of 6 unit length / s, and line CD moves uniformly to the left at the speed of 2 unit length / S. (1) ask how many seconds BC = 8 (unit length)? (2) when BC = 8 (unit length), the line AB moves uniformly to the right at the speed of 6 unit length / s, The number represented by point B on the number axis is. (3) when 3 is less than or equal to T and less than 13 / 4, when point B moves to the line segment CD, P is the point on the line segment ab. is there a relation bd-ap = 3pc? If it exists, find the length of the line segment PC; if it does not exist, explain the reason
(1) After T seconds, the coordinates of B and C are (6t-8) and (16-2t) respectively, if BC = 8, that is | (6t-8) - (16-2t) | = 8, t = 2 or T = 4
(2) As above, the coordinate position of B is 4 or 16
(3) After. T seconds, the coordinates of a are (6t-10), B are (6t-8), C are (16-2t), D are (20-2t). BD = | 8t-28 |, let AP = x, p be (6T + X-10) if (bd-ap) / PC = 3, because B is on CD, so 3
A point on the number axis that represents an integer is called an integral point. The unit length of a certain number axis is 1cm. If you draw a line AB with length of 2007cm randomly on the number axis
2008
Although he said that the point representing an integer is an integral point, it has nothing to do with the answer
It should be: when both ends a and B of the line segment with length of 2007cm are integral points, the line
The number of integral points covered by segment AB is 2007 + 1 = 2008 (we are 2006 + 1 = 2007)
(2)
If point a is not an integral point, then point B is not an integral point, and the number of integral points covered by line AB at this time
It's 2007. To sum up, there are 2007 or more points covered by the line segment with the length of 2007cm
2008
2007 or 2006
∵ a point on a number axis whose coordinate is an integer is called an integral point. The unit length of a number axis is 1cm,
And randomly draw a line AB with a length of 2007 cm
When the starting point of line AB is on the whole point, it is 2007; when the starting point is not on the whole point, it is 2006
A: there are 2006 or 2007 integral points covered by line ab
I tell you, both of them are possible! Which one is right
I still think it's 2008
2007 or 2006
(the answer process is as follows)
∵ a point on a number axis whose coordinate is an integer is called an integral point. The unit length of a number axis is 1cm,
And randomly draw a line AB with a length of 2007 cm
When the starting point of line AB is on the whole point, it is 2007; when the starting point is not on the whole point, it is 2006
A: there are 2006 or 2007 integral points covered by line ab. ... unfold
2007 or 2006
(the answer process is as follows)
The unit of the length of an integral point on the axis is called 1 cm,
And randomly draw a line AB with a length of 2007 cm
When the starting point of line AB is on the whole point, it is 2007; when the starting point is not on the whole point, it is 2006
A: covering the whole line segment of 2006 or 2006. Put it away
I just made this the day before yesterday
It should be like this: (1)
Although he said that the point representing an integer is an integral point, it has nothing to do with the answer
It should be: when both ends a and B of the line segment with length of 2007cm are integral points, the line
The number of integral points covered by segment AB is 2007 + 1 = 2008 (we are 2006 + 1 = 2007).
(2)
A point on a number axis that represents an integer is called an integral point. The unit length of a number axis is 1cm. If a line segment AB of 2011cm is drawn on the number axis, how many punctual points are covered by the line segment AB? Explain the reason
choice
2010 or 2011 2009 or 2010 2009 or 2011 2010 or 2012
In 2010 or 2012, if you draw a 1 cm axis with 2 integer points, so does 2011. If the starting point is a decimal, there is only one point
——I wrote it myself
I used to be the representative of Su mathematics class. Now, I'm the monitor of Su
2010 or 2011
The number of integral points covered by 1 cm is at most 2 and at least 1
The number of integral points covered by 2 cm is at most 3 and at least 2
The number of integral points covered by 3cm is at most 4 and at least 3
……
The number of whole points covered by 2010 cm is 2011 at most and 2010 at least
The concept of addition, subtraction, multiplication and division,
The concept of addition, subtraction, multiplication and division, thank you
Addition: addition is one of the four basic operations. It refers to the process of combining two or more numbers and quantities into one. The sign of addition is the plus sign (+). When adding, use the plus sign to connect the items. Put the sum after the equal sign (=). Subtraction: remove one number or quantity from another
Finding the domain of definition of 2Sin + 1 under the function y = root
The result is: 2sinx + 1 > = 0
sinx>=-0.5
2kπ-π/6
Physics Formulas?,? /,?,,?, in the second grade of junior high school?
(1) series circuit P (electric power) U (voltage) I (current) w (electric work) r (resistance) t (time)
The current is equal everywhere, I1 = I2 = I
The total voltage is equal to the sum of the voltages at both ends of each consumer, u = U1 + U2
The total resistance is equal to the sum of the resistances r = R1 + R2
U1：U2=R1：R2
The total electric work is equal to the sum of the electric work w = W1 + W2
W1：W2=R1：R2=U1：U2
P1：P2=R1：R2=U1：U2
The total power is equal to the sum of the powers, P = P1 + P2
(2) parallel circuit
The total current is equal to the sum of the currents I = I1 + I2
The voltage is equal everywhere U1 = U1 = U
The total resistance is equal to the product of the resistances divided by the sum of the resistances r = r1r2 △ (R1 + R2)
The total electric work is equal to the sum of the electric work w = W1 + W2
I1：I2=R2：R1
W1：W2=I1：I2=R2：R1
P1：P2=R2：R1=I1：I2
The total power is equal to the sum of the powers, P = P1 + P2
(3) electric power of the same electrical appliance
① The ratio of rated power to actual power is equal to the square of rated voltage to actual voltage, PE / PS = (UE / US)
2. Formula of circuit
(1) resistance R
① Resistance is equal to the density of the material multiplied by (length divided by cross-sectional area) r = density × (L △ s)
② Resistance is equal to voltage divided by current R = u △ I
③ The resistance is equal to the square of the voltage divided by the electric power r = UU △ P
(2) electric work
Electric work is equal to current times voltage times time w = uit (common formula)
Electric work is equal to electric power times time w = Pt
Electric work is equal to charge times voltage w = QT
Electric work is equal to the square of current times resistance times time w = I × IRT (pure resistance circuit)
Electric work is equal to the square of voltage divided by resistance and then multiplied by time w = u &; u △ R × t (same as above)
P power
① Electric power is equal to voltage times current, P = UI
② Electric power is equal to the square of current multiplied by resistance P = IIR (pure resistance circuit)
③ The electric power is equal to the square of the voltage divided by the resistance P = UU △ R (as above)
④ Electric power is equal to electric work divided by time p = w: T
(4) electric heating Q
Electric heating is equal to the square of electric current, which is resistance times time q = iirt (common formula)
Electric heating is equal to current times voltage times time q = uit = w (pure resistance circuit)
A-0.2a is equal to
A-0.2a equals 0.8A
a-0.2a
=(1-0.2)a
=0.8a
What is the definition of addition, subtraction, multiplication and division?
+: the sum of a number and another number or other numbers -: the difference between a number and another number or other numbers *: the product of a number and another number or other numbers /: the quotient (except 0) of a number and another number or other numbers. The meaning of integer multiplication refers to the simple method of adding several identical numbers
F (x) = 2Sin (x / 4) cos (x / 4) - 2 root sign 3 * Sin & # 178; (x / 4) + root sign 3 find 1. When x ∈ [0, π], find f (x) range 2. F (x) monotone increasing interval
f(x)=2sin(x/4)cos(x/4)-2v3*sin²(x/4)+v3      =sin(x/2)-v3*(1-cos(x/2))+v3      =sin(x/2)+v3cos(x/2)      =2sin(x/2 +π/3)x∈[0,π].    ...