Given that a (m, N + 1) and B (2m-1, N + 3) are symmetric with respect to the bisector of the angle between the two and four quadrants, we can find the value of M, n?
three
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- 2. If (M + n) ^ 2-MN (M + n) = (M + n) · m, then M is () a.m ^ 2 + n ^ 2 B.M ^ 2-MN + n ^ 2 C.M ^ 2-3mn + n ^ 2 D.M ^ 2 + Mn + n ^ 2
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- 6. Let u = R, a = {X / X is an acute triangle} B = {X / X is an isosceles triangle} find the complement of a and B
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- 8. An isosceles triangle must be an acute triangle______ (judge right or wrong)
- 9. An isosceles triangle with a vertex angle of 70 degrees must be an acute triangle______ (judge right or wrong)
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- 11. In the plane rectangular coordinate system, let the point of P (2m-3,3-m) symmetric about y axis be in the second quadrant, and try to determine the value of integer M
- 12. Given that the symmetric point of M (- 5,2m-1) with respect to the origin is in the first quadrant, then the value range of M is? Answer,
- 13. If P (x, y) XY > 0, then p is in quadrant; if XY < 0, then p is in quadrant
- 14. It is known that m and N are opposite to each other. The distance between the points m and n that represent the number m and N on the number axis is 2012 length units. Try to find two numbers m and n
- 15. If the distance between a and B is D, what is the quantitative relationship between D and m, n? If a and B are given...% d% a and B are given m and N. if a and B are given D, what is the quantitative relationship between D and m, n? If a and B are given X and - 1, The distance d between two points of B can be expressed as? If d = 3, find X
- 16. Given that the distance between the point M representing the number a and the point n representing the number - 1 on the number axis is 3, and the distance between the point n representing the number B and the point n representing the number 2 is 4, calculate the distance Mn
- 17. The chord length of the straight line kx-y + 6 = 0 cut by the circle x ^ 2 + y ^ 2 ^ = 25 is 8? The radius of the circle is 5 The straight line kx-y + 6 = 0 is cut by the circle x ^ 2 + y ^ 2 = 25, and the chord length is 8 So the distance from the center of the circle to the straight line = root (5 ^ 2-4 ^ 2) So 6 / radical (k ^ 2 + 1) = 3 k^2+1=4 K = radical 3 or K = - radical 3 So the distance from the center of the circle to the straight line = root sign (5 ^ 2-4 ^ 2). How does 4 ^ 2 come from here?
- 18. 1. Let a straight line pass through the point (0, a), the slope is 1, and it is tangent to the circle x2 + y2 = 2x, then the value of a is 2. In a pyramid v-abcd, if the bottom surface ABCD is a square with side length 2 and the other four sides are isosceles triangles with side length 5, then the plane angle of the dihedral angle v-ab-c is What are the ways to judge dihedral angle
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