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If lx-2l + ly + 3L + lz-5l = 0, find the value of XYZ (2) find the value of | x | x | y | x | 1z |
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- 1. If the tangent point is in the third quadrant, then the equation of the line is______ ．
- 2. The maximum distance from the point on the circle (x + 3) 2 + (Y-1) 2 = 25 to the origin is () A. 5-10B. 5+10C. 10D. 10
- 3. In the rectangular coordinate system, O is the origin of the coordinate, and the line L passes through the point P (3. Root 2) and the right intersection f where the square of the curve X divided by 3 minus the square of Y equals 1
- 4. The distance between the center of a circle with x square plus y square equal to 25 and the line with x plus y plus 1 equal to 0 is
- 5. The distance between a circle whose square of circle x + y equals 25 and a line whose square of circle x + y + 1 equals 0 is?
- 6. The distance from the center of the circle x square + y square = 25 to the straight line x + y = 0 is—— Write down the specific process
- 7. What is the distance between the center of circle x + y = 25 and the realized x + y + 1 = 0?
- 8. Let f (x) = lx-1l + LX Al, if any x ∈ R, f (x) ≥ 2, find the value range of A
- 9. Set a = {XLX ^ 4-1 = 0, X ∈ C}, z = 2-3i, then the maximum value of LX ZL is?, and the minimum value is?
- 10. Given 2x − 13 − 1 ≥ x − 5 − 3x2, find the maximum and minimum of | X-1 | - | x + 3 |
- 11. Given that LX + 2L and ly + 7L are opposite to each other, find the value of - x + y
- 12. Given lx-1l + ly-3l = 0, find y + X of y-x. given that a is greater than 0, B is less than 0, and LAL is less than LBL, try to compare the sizes of a, - A, B, - B
- 13. When x tends to 2, y = x ^ 2 tends to 4 Ask for detailed explanation
- 14. Given lx-4l + ly + 2L = 0, find the value of 2x Lyl
- 15. It is known that LXL is less than or equal to 1 and Lyl is less than or equal to 1. Let m = LX + YL + ly + 1L + l2y-x-4l, find the maximum and minimum of M
- 16. Given XY / (x + y) = 2, find (3x-5y + 3Y) / (- x + 3xy-y)
- 17. Ask for a math problem: if x + y = 3, xy = - 4, then the algebraic formula y ^ 3x-x ^ 3Y=_____ Thank you! Please answer as soon as possible
- 18. Let's know the square of X + xy = 3, the square of XY + y = - 21. Find the square of X + 4xy + 3Y, the square of 2.2x-xy-3y
- 19. Urgent. It must be done today Figure 8 shows the charging standard of a highway toll station for passing vehicles. (large vehicle 30 yuan / vehicle, medium vehicle 15 yuan / vehicle, small vehicle 10 yuan / vehicle) one day, the ratio of the number of large vehicles and medium vehicles passing through the toll station is 5:6, the ratio of the number of medium vehicles and small vehicles is 4:11, and the total toll of small vehicles is 270 yuan more than that of large vehicles (1) How many large cars, medium cars and small cars will pass through the toll station on this day? (2) How much is the total charge for this day? Party A and Party B worked together to clear the snow on the 400 meter circular runway. They both cleaned the snow from the same place. At first, party a cleaned the snow one third faster than Party B. later, Party B used 10 minutes to adjust the tools and went back to clean it, but the work efficiency was twice as high as before, How many minutes did B work after changing tools? We need a formula
- 20. Ask for advice, today The N-1 power of Y minus the square of Y multiplied by the N-2 power of Y minus the 4 power of Y - the N + 1 power of Y multiplied by y =?