If the line ax + 2y-3 = 0 is perpendicular to the line x + y + 1 = 0, then a is equal to

Negative two

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1. The distance between two parallel lines ax + 2y-1 = 0 and X + (A-1) y + 2 = 0 is? Is the value of a calculated by using the same slope and then by using the knowledge of the distance between two parallel lines?
2. If the line ax + 2y-3 = 0 is parallel to x + (A-1) y + 2 = 0, then the value of a is
3. If the line ax + 2y-1 = 0 is parallel to the line X-Y + 2 = 0, then the real number a =
4. A = 2 is the () condition that the line ax + 2Y = 0 is parallel to the line x + y = 1
5. If the line ax + 2y-6 = 0 is parallel to x + (A-1) y - (A & # 178; - 1) = 0, then the distance between them is equal to? There is also help to find (1-k) (k-1 / 7) = - 1-k (1 + K / 7)
6. If the line ax + 2Y + 2 = 0 is parallel to the line 3x-y-2 = 0, then the real number a is equal to () A. -6B. -3C. −32D. 23
7. The line L1 is ax + 2y-1 = 0, and the line L2 is x + (A-1) y + 2 = 0 if L1 ⊥ L2 finds the value of A
8. Line L1: ax + 2Y + 1 = 0 and line L2: (3-A) X-Y + a = 0, two lines parallel, then the value of a is, how to calculate!
9. If the lines L1: ax + (1-A) y = 3, L2: (A-1) x + (2a + 3) y = 2 are perpendicular to each other, then the value of a is () A. 0 or - 32B. 1 or - 3C. - 3D. 1
10. If the lines L1: ax + (1-A) y = 3, L2: (A-1) x + (2a + 3) y = 2 are perpendicular to each other, then the value of a is () A. 0 or - 32B. 1 or - 3C. - 3D. 1
11. 1 the line ax + 2Y + 1 = 0 is perpendicular to the line x + Y-2 = 0, then what is the value of a? 2 find the minimum of the sum of the distances from any point on the x-axis to the fixed point (0,2), (1,1)?
12. If the line ax + 2Y + 1 = 0 is perpendicular to the line x + Y-2 = 0, then a=______ ．
13. If the line ax + 2Y + 1 = 0 is perpendicular to the line x + 3y-2 = 0, what is the value of a?
14. 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)?
15. The equation of circle passing through point (8,1) and tangent to two coordinate axes
16. 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
17. The standard equation for a circle whose center is on a straight line 5x-3y = 8 and tangent to two coordinate axes
18. {7x + 6y = - 19,6y-5x = 17 to solve the equations
19. 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!
20. (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