It is known that the line l1:4x-3y + 6 equals zero, the line L2: x equals minus 1, and the square of the parabola y equals the moving point P on 4x to the straight line It is known that the line L1: 4x minus 3Y plus 6 equals zero, the line L2: x equals minus 1, and the square of the parabola y equals the sum of the distances from the moving point P on 4x to the line L1 and the line L2? A. 1 B.3 c.d.16 molecule 37
Because x = - 1 is the directrix of a parabola,
The minimum value is the distance from the focus of the parabola to the line L1
d=2
RELATED INFORMATIONS
- 1. It is known that the minimum value of the sum of the distances from the moving point P on the parabola y2 = 4x to the lines L1 and L2 is () A. 2B. 3C. 115D. 3716
- 2. The linear equation of the line 3x + 5y-1 = 0 is symmetric with respect to the line 4x + 3y-5 = 0
- 3. A = 3 is a line ax + 2Y + 3A = 0 and a line 3x + (A-1) y = A-7 which are parallel and not coincident () A. Sufficient and nonessential condition B. necessary and nonessential condition C. sufficient and necessary condition D. neither sufficient nor necessary condition
- 4. (2012. Pudong New Area three mode) "a=3" is "straight line ax+2y+3a=0 and straight line 3x+ (A-1) y=a-7 parallel". A. Sufficient and unnecessary condition B. necessary and insufficient condition C. sufficient and necessary condition D. neither sufficient nor necessary condition
- 5. The distance between the line 4x-3y + 4 = 0 and the line 8x-6y + a = 0 is 2 Is self-learning high school curriculum for detailed explanation!
- 6. {7x + 6y = - 19,6y-5x = 17 to solve the equations
- 7. The standard equation for a circle whose center is on a straight line 5x-3y = 8 and tangent to two coordinate axes
- 8. The standard equation for a circle whose center is on the straight line 5x-3y-8 and tangent to both axes Good brother and sister, do me a favor
- 9. The equation of circle passing through point (8,1) and tangent to two coordinate axes
- 10. If f (x) = ax ^ 3 + 3x ^ 2 + 2 and f '(- 1) = 4, then the value of real number a is equal to? f'(x)=3ax²+6x f'(-1)=3a-6=4 A = 10 / 3 what you have done, but still don't understand. How can you calculate f '(x)?
- 11. Make two mutually perpendicular straight lines L1 and L2 through point P (2,4). If L1 intersects X-axis at point a and L2 intersects Y-axis at point B, find the trajectory equation of the midpoint m of line ab
- 12. The trajectory equation of the point with equal distance to the line y = 0 and the line y = √ 3 (x + 1), The answer is (√ 3x-3y + √ 3) (√ 3x + y + √ 3) = 0 I'm dull and love to get to the top of things, so the more detailed the better,
- 13. Find the trajectory equation of the point with the same distance between two lines 2x-y-1 = 0 and 4x-2y + 9 = 0
- 14. If the point P (2, - 1) is known, the equation of the line L which passes through the point P and has the largest distance from the origin is obtained, and the maximum distance is obtained;
- 15. Given point P (2, - 1), what is the maximum distance between point P and the origin Why is the maximum distance OP?
- 16. On the number axis, the point of - 5 is at the beginning of the origin___ Side, the distance from the origin is___ . the distance from the origin is 4 units of length__ Yes, they are___ On the number axis, a point five units in length away from the point representing - 2 is the same as the number represented____ ? Simplification: 1 - 2=____ ? -The absolute value of 4.7 is____ The number whose absolute value is 3 and 1 / 5 is___ ? The number with the smallest absolute value is__ The number whose absolute value equals itself is____ ? Given x = 8, y = - 2, find the value of x-4, y Comparison size: 1 + 5___ - 6; 1 - 100___ -(-101). All integers greater than - 3 and less than 2 are___ ? Fill in the appropriate integer in the following box to make the formula true: - 3 < mouth < - 1.5 < mouth < 0 < mouth < 2 Given a = 4, B = 3 and a < B, try to find the value of a and B
- 17. On the number axis, the distance to the origin is the root sign, and the number of 6 is
- 18. On the number axis, which side of the origin is the point representing the number 6, and the distance to the origin is several unit lengths; the distance from the point representing the number 6 to the point representing the number-8 is Several units of length
- 19. It is known that the eccentricity e of ellipse C: x ^ 2 / A ^ 2 + y ^ 2 / b ^ 2 = 1 (a > b > 0) is 1 / 2, and the distance from origin o to straight line X / A + Y / b = 1 is d = (2 √ 21) / 7 The equation of ellipse is x ^ 2 / 4 + y ^ 2 / 3 = 1 Solution: make a straight line through point m (√ 3,0) and intersect ellipse C at two points P and Q, and find the maximum area of △ OPQ
- 20. It is known that the eccentricity of ellipse x ^ 2 / A ^ 2 + y ^ 2 / b ^ 2 = 1 (a > b > 0) e = √ 6 / 3, and the distance between the line passing through points a (0, b) and B (a, 0) and the origin is √ 3 / 2 Given the fixed point E (- 1,0), if the line y = KX + 2 (K ≠ 0) intersects the ellipse at two points c and D, ask: is there a value of K to make the circle with diameter CD pass through point e? Please explain the reason