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What is the definition of number axis
The number axis defines the origin. The straight line with positive direction and unit length is called the number axis. All real numbers can be used
Draw a horizontal line, take a point on the line to represent 0 (called origin), select a certain length as the unit length, and specify the right direction of the line as positive direction, So the origin, unit length and positive direction are the three elements of the number axis. Using the number axis, we can compare the size of rational numbers. The numbers represented by the points from left to right on the number axis are in the order of small to large
RELATED INFORMATIONS
- 1. We know that the meaning of | 5 | = | 5-0 |, on the number axis, is the distance between the point of 5 and the origin (that is, the point of 0). For example, the meaning of the formula | 6-3 |, on the number axis, is the distance between the point of 6 and the point of 3. Similarly, what is the meaning of the formula | a + 5 | on the number axis?
- 2. What is the meaning of absolute value a + 5 on the number axis
- 3. A math problem: on the number axis, point a means negative 10, point B means positive 14 1. Please divide line AB into six equal parts to get C, D, e, F and g respectively, and then write down the numbers they represent? 2. Please divide the line AB into four equal parts to get the points h, m and N respectively, and then write down the numbers they represent?
- 4. What is the geometric meaning of differentiability? Is that understandable z=f(x,y) (x,y)-->(x+Δx,y+Δy) It can be expressed as: (DZ =) Δ Z ≈ a * Δ x + b * Δ y Where a and B are the partial derivatives of Z to X and Y respectively, that is, (x, y) -- > (x + Δ x, y + Δ y) the distance between two points can be expressed as the result of summation of a * Δ X in X direction and B * Δ y in Y direction
- 5. Is there a minimum value for the absolute value of x-3 + X-6? If so, write it down. If not, explain why
- 6. 123 cubic decimeter = how many cubic meters
- 7. When calculating the division with remainder, the divisor 385 is wrongly written as 835, so the quotient is 30 more than the original, and the remainder is exactly the same. Find the divisor and remainder of this division formula
- 8. It is known that a = 2x and B is a polynomial. When calculating B + A, Xiao Mahu regarded B + A as B △ a, and the result was X. thank you,
- 9. The solution of the inequality 2x & sup2; - 5ax-3a < 0 about X Given the quadratic function f (x) = ax & # 178; + BX + C, (1) if a > b > C, it is proved that the image of F (x) has two different intersections with X axis; (2) under the condition of (1), let two intersections be a and B, and find the length of line ab
- 10. How to simplify (2a + 3b) (3a + b) - 3AB
- 11. The concept of number axis
- 12. Mathematics number axis of grade one in junior high school On the right side of the origin, what is the number of points half a unit from the origin~
- 13. If a is on the left side of the number axis and B is on the right side of the number axis, what is the absolute value of a + B, what is the absolute value of A-B, and why
- 14. Given the numbers a and B on the left side of a on the number axis, mark the absolute value of - A and the absolute value of - B on the number axis, and compare the absolute values of a, B, - A and - B b
- 15. What is the relationship between the distance between two points and the absolute value of the number difference corresponding to these two points For example: what is the case when both numbers are positive? What is the case when both numbers are negative? What's one plus one minus?
- 16. Draw the points representing the numbers of the following groups on the number axis, and think about the relationship between the distance between the corresponding points of each group and the absolute value of the difference between the two numbers 6 and 1 3 and - 2 - 3 and - 5 0 and - 2
- 17. If the distance between two corresponding points on the number axis of two numbers with equal absolute value is 8, then the two numbers are, and if the number is calculated, then the two numbers are
- 18. If the point representing the number x on the number axis is to the left of the origin, the result of simplifying 2A + radical a ^ 2 is?
- 19. If the point representing the number x on the number axis is on the left side of the origin, the result of simplifying │ 3x + √ x │ is?
- 20. Given that a and 2b are reciprocal to each other, - C and (D / 2) are opposite to each other, / X / = 4, find the value of 4ab-2c + D + (x / 4)