The distance from point a (6, - 8) to the y-axis is____ The distance to X is____ The distance to the origin is___

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• 1. If the point Q (8.6) is known, the distance from it to the x-axis is - ---, the distance from it to the y-axis is - ---, and the distance from it to the origin is - ---
• 2. How to find the distance from the midpoint to the origin in the plane rectangular coordinate system
• 3. In the plane rectangular coordinate system, if the distance from point a (3, b) to the origin is 5, then the value of B is______ ．
• 4. In the plane rectangular coordinate system, write out the coordinates of the following points: (1) point a is on the negative half axis of the axis, and the distance from the origin is 5 units (2) Point B is on the positive half axis of the axis and is three units away from the origin (3) Point C is in the second quadrant, and its distances to the x-axis and y-axis are 3 units and 4 units respectively
• 5. On the number axis, the number of integer points whose distance from the origin is less than 2 is x, and the number of integer points whose distance from the origin is not more than 2 is y, then the sum of X and y
• 6. 26. On the number axis, the number of integer points whose distance from the origin is less than 2 is x, and the number of integer points whose distance from the origin is not more than 2 is y
• 7. The number of integer points whose distance from the number axis to the origin is less than 2 is x, the number of integer points whose distance is not more than 2 is y, and the number of integer points whose distance is equal to 2 is Z. find the value of X + y + Z
• 8. On the number axis, all integers whose distance to the origin is not more than 2 have______ (drawing)
• 9. Elliptic parametric equation with focus on Y-axis?
• 10. What is the elliptic parametric equation with focus on the y-axis? y^2/a^2-x^2/b^2=1 (a>b>0) Two people have different answers. Who do I listen to?
• 11. As shown in the figure, there is a point C on the semicircle o with the diameter of ab. through point a, make the tangent of the semicircle and intersect the extension line of BC at point D If BC = 2, root sign 3, EF = 1, find AC It has been proved that delta ADC is similar to triangle BDA The painting is not very good.
• 12. 32. As shown in the figure, the side length of square ABCD is a, take AB as the diameter, make semicircle o, cross point C, make the tangent of semicircle ad to F, and the tangent point is e (1) Verification: OC ⊥ of; (2) Find the perimeter and area of RT △ DCF
• 13. As shown in the figure, AB is the diameter of ⊥ o, P is a point on the extension line of AB, PC is the tangent of ⊥ o, C is the tangent, BD ⊥ PC, Foot drop is D, cross o to e, connect AC.BC (1) BC ^ 2 = BD * ba. (2) if AC = 6, de = 4, find PC
• 14. As shown in the figure, it is known that the unit circle O and y-axis intersect at two points a and B. the vertex of angle θ is the origin, the starting edge is on the positive half axis of x-axis, and the ending edge is on the ray OC. The function value of the directed line AC is () A. sinθB. cosθC. tanθD. cotθ
• 15. Any function f (x) defined on R can be expressed as the sum of an odd function g (x) and an even function H (x), if f (x) = LG (x times of 10 + 1), X The analytic expressions of G (x), H (x) belong to R Thank you very much. I hope you can answer quickly
• 16. The number reasoning problem of civil servant's line test: 0,0,6,24,60120 () a.180 b.196 c.210 d.216 0 = 0 ^ 3-0, 0 = 1 ^ 3-1, 6 = 2 ^ 3-2, 24 = 3 ^ 3-3, 60 = 4 ^ 4-4, 120 = 5 ^ 35, (210 = 6 ^ 3-6) what does this symbol mean?
• 17. How many square meters is 830 square decimeters equal to
• 18. Cut the 12 meter long rope into 10 sections on average, and each section is full length______ , length of each segment______ Rice
• 19. What is the formula for calculating the radius of a circle?
• 20. Find the rule: 2, 3, 5, 7, 11, 13, x, 19, 23, 29, what is x? A17 B15 C19