If the line y = 2x-m has a common point with the ellipse x ^ 2 / 75 + y ^ 2 / 25 = 1, then the value range of the real number m is

A common point indicates that the discriminant is greater than or equal to 0
You talk about straight line into the elliptic equation, and then use the above discriminant greater than or equal to 0 can be calculated

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1. If the line y = KX + 1 (K ∈ R) and the ellipse X25 + y2m = 1 always have a common point, then the value range of M is () A. [1，5）∪（5，+∞）B. （0，5）C. [1，+∞）D. （1，5）
2. We know the straight line y = x + m and ellipse 4x & # 178; + Y & # 178; = 1 When m is the value, the line and ellipse are separated, tangent and intersect 2 find the linear equation of the longest chord cut by the ellipse
3. The ellipse 4x & # 178; + Y & # 178; = 1 and the straight line L: y = = x + m are known 1. When a line and an ellipse have a common point, find the value range of the real number M 2. Find the linear equation of the longest chord cut by the ellipse
4. It is known that there are two intersections between the straight line y = 2x + m and the ellipse x ^ 2 / 9 + y ^ 2 / 4 = 1, so the value range of the real number m can be obtained
5. There are two different intersection points between the straight line y = x + m and the ellipse 2x square + y square = 1. Find the value range of the real number M
6. Given that non negative integers x, y, Z satisfy X-1 / 2 = 6-y / 3 = Z-3 / 4, let w = 3x + 4Y + 5Z, find the maximum and minimum of W
7. Given the nonnegative integers x, y, Z, satisfying (x-1) / 2 = (6-y) / 3 = (Z-3) / 4, let w = 3x + 4Y + 5Z, find the maximum and minimum of W?
8. It is known that there is a point (4, - 1) in the ellipse x ^ 2 / 25 + y ^ 2 / 9 = 1, f is the right focus, M is the moving point on the ellipse, and the minimum value of Ma + MF (detailed explanation)
9. Given that P is the point on the ellipse X225 + Y29 = 1, Q and R are the points on the circle (x + 4) 2 + y2 = 14 and (x − 4) 2 + y2 = 14 respectively, then the minimum value of | PQ | + | PR | is () A. 89B. 85C. 10D. 9
10. Let p be a point on the ellipse x ^ / 25 + y ^ / 9 = 1 and Q R be a point on the circle (x + 4) ^ + y ^ = 1 / 4 and (x-4) ^ + y ^ = 1 / 4 respectively, then what is the minimum value of PQ + PR,
11. Find the focus and focal length of ellipse: 2x ^ 2 + y ^ 2 = 8; 3x ^ 2 + 4Y ^ 2 = 12
12. Given a point P (x, y) on the ellipse x * 2 / A * 2 + y * 2 / b * 2 = 1 (a > b > 0), find the value range of 3x + 4Y X * 2 is the square of X /Denotes divided by
13. Analytic geometry elliptic problem: elliptic equation x ^ 2 + 1 / 2Y ^ 2 = 1, straight line y = x + B, there are two points on the ellipse symmetrical about the straight line, find the value range of B So x1-y1 + B = x2-y2 + B or x1-y1 + B = - (x2-y2 + b) That is, x1-x2 = y1-y2 or X1 + x2 = Y1 + Y2 How to x1-y1 + B = - (x2-y2 + b) to X1 + x2 = Y1 + Y2 2b is gone?
14. Given the elliptic equation x ^ 2 / 2 + y ^ 2 / 3 = 1, try to determine the value range of B, so that there are two different points on the ellipse, a and B are symmetric about the straight line y = 4x + B
15. Elliptic equation x ^ 2 / 4 + y ^ 2 / 3 = 1, try to determine the value range of T, so that there are two different points on the ellipse symmetrical about the straight line y = 4x + t
16. Given that the center of the ellipse t is at the origin, the focus is on the X axis, the eccentricity is √ 3 / 2, and passes through the focus F of the parabola C: X & # 178; = 4Y, the equation of the ellipse t is solved
17. The vertex of the parabola is at the origin, its directrix passes through a focus F1 of the ellipse x ^ 2 / A ^ 2 + y ^ 2 / b ^ 2 = 1 (a > b > 1), and is perpendicular to the major axis of the ellipse The vertex of the parabola is at the origin, and its quasilinear passes through a focus F1 of the ellipse x ^ 2 / A ^ 2 + y ^ 2 / b ^ 2 = 1 (a > b > 1), and is perpendicular to the major axis of the ellipse. The intersection of the parabola and the ellipse is m (2 / 3, 2 radical 6 / 3). Solve the parabola and the elliptic equation
18. Let the eccentricity of the ellipse x2 / A2 + Y2 / B2 = 1 (a > b > 0) be e = 1 / 2, the right focus f (C, 0), equation a
19. It is known that the eccentricity of ellipse C: x2 / A2 + Y2 / B2 = 1 (a > b > 0) is 2 / 3, passing through focus f (C, 0) and point B (0, 0), Urgent, final exam
20. It is known that the eccentricity of the ellipse x2 / A2 + Y2 / B2 = 1 (a > b > 0) is √ 2 / 2, and the right focus is f (1,0) If a straight line with an inclination angle of 45 ° intersects the ellipse at two points a and B, calculate the value of ab