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If there is only one common point between the straight line passing through point (1, - 3) and hyperbola x ^ 2-y ^ 2 = 4, find the slope k of the straight line The answer is 1 or - 1 or 1 + 4 √ 3 / 3 or 1-4 √ 3 / 3
If there is only one common point between the straight line passing through point (1, - 3) and hyperbola X & # 178; - Y & # 178; = 4, find the value of the slope k of the straight line. Hyperbola X & # 178 / 4 + Y & # 178 / y = 1 is an equiaxed hyperbola with a = b = 2, so its asymptote is y = ± X; so when the straight line passing through point (1, - 3) is parallel to the two asymptotes, it is also
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- 1. It is known that the equation of a circle is (x-1) 2 + y2 = 9, and the tangent equation of a circle passing through a point (- 2,4) is obtained
- 2. It is known that the parameter equation of the straight line is x = 1 + 2T, y = 2 + t Given the linear parameter equation {x = 1 + 2T, y = 2 + T (t is the parameter)}, then the chord length of the line cut by the circle x ^ 2 + y ^ 2 = 9 is In my teaching assistant answer, I changed this formula into x = 1 + 2 / root 5T and y = 2 + 1 / root 5T. How does this change
- 3. (2011 · Anhui simulation) if the point P (1,1) is the midpoint of the chord Mn with circle (x-3) 2 + y2 = 9, then the linear equation of the chord Mn is () A. 2x+y-3=0B. x-2y+1=0C. x+2y-3=0D. 2x-y-1=0
- 4. 5. P is the point on the right branch of hyperbola x ^ 2 / 9-y ^ 2 / 16 = 1, m and N are the points on the circle and circle respectively, and the maximum value of pn-pm can be obtained
- 5. How many days are there from June 24, 2011 to June 24, 2012?
- 6. In 2005, the number of days with excellent air quality accounted for 5 / 3 of the whole year?
- 7. 1. Calculation: X-Y of X + y + Y-3 of 2x 2. Calculation: x + 3 of X & # 178; - X-2 divided by (2-x) + X + 3 of X + 1
- 8. 15 / 2 by 10 / 3 17 / 8 by 4 / 1 25 / 9 by 12 / 5 10 / 6 by 15 / 7 9 / 8 by 4 / 27 7 / 5 by 25 / 11 3 / 2 by 5 / 6 If it's right, I'll offer a reward. If it's wrong, I won't offer a reward 2 of 15 times 3 of 10, 8 of 17 times 1 of 4, 25 / 9 times 12 / 5, 10 / 6 times 15 / 7, 9 / 8 times 4 / 27, 7 / 5 times 25 / 11, 3 / 2 times 5 / 6
- 9. Four x minus three fifths equals five
- 10. 1,4,9,16,25?64,81
- 11. As shown in the figure, D is the midpoint of the AC side in the equilateral triangle ABC, e is on the extension line of BC, de = dB, if the perimeter of △ ABC is 6, then the perimeter of △ BDE
- 12. If the points P and Q are on the line AB, and AP: Pb = 2:3, AQ: QB = 3:4, and PQ = 4, find the length of ab Map to process (no map is OK) a variety of solutions to complete~
- 13. How to use the lever principle of tweezers? How to draw the schematic diagram of its power and resistance? Also, which direction is the schematic diagram of the power of pulling nails with a hammer? So does the direction of power and resistance not have to be opposite or opposite?
- 14. Given that the shadow area is 50 square centimeters, find the area of triangle ABC
- 15. The second grade of junior high school Given the linear function y = KX + B, if y increases with the increase of X, which three image limits does the function image pass through? The correct answer is one two three quadrants. Why is there no one three four quadrants? Y increases with the increase of X. isn't the image rising from left to right? Why is there only one two three quadrants?
- 16. 1. Find the root sign (1 + 2 * sin610 ° * cos430 °) / sin 250 ° + cos 790 ° PS: the root sign is 1 + 2 * sin610 ° * cos430 ° 2. Given Tan a = - 3, find the value of the following formula: (1)(4*sin a-2*cos a)/(5*cos a=3*sin a) (2) (sin a-cos a)^2 There should be a specific process
- 17. For junior high school mathematics how to learn the number of good?
- 18. What are the symbols of mathematics?
- 19. (about the number of culverts) If f (2x-5) is divisible by X, then f (x) is divisible by which of the following? a.x b.-x c.5-2x d.(5+x)/2 I still don't understand, Why do we need to change f (2 × 5) = A and then transform the main term to get the answer?
- 20. What are the inverse numbers