A.b .-c . d-
2. The inclination angle between the passing point (3,0) and the point (0,3) is ()
A.b .-c . d-
3. The slope of the straight line passing through p (-2, m) and Q(m, 4) is equal to 1, so the value of m is equal to ().
A. 1 or 3b.4c. 1d. 1 or 4.
4. In the rectangular coordinate system, the inclination angle of the straight line y= -x+ 1 is ().
A.b .-c . d-
5. The inclination between the passing point (-3,0) and the point (-4,0) is ()
A.B. C. D。
6. As shown in the figure, if the slopes of the straight lines l 1, l2 and l3 are k 1, k2 and k3 respectively, there is ().
a . k 1 & lt； k2 & ltk3 B.k3 & ltk 1 & lt； k2
C.k3 & ltk2 & ltk 1d . k 1 & lt； k3 & ltk2
7. If the inclination angles of two straight lines A and B are respectively, the correct one of the following four propositions is ().
A. if yes, the slope k 1
C if the slope k 1
8. The following propositions:
(1) If points P (X 1, Y 1) and Q (X2, Y2), the slope of the straight line PQ is;
(2) Any straight line has a unique inclination angle, but it is not necessarily a slope;
(3) The slope k of the straight line satisfies the inclination angle;
(4) The inclination of the straight line parallel or coincident with the X axis is 00. The number of the above correct propositions is ()
A.0 B. 1 C.2 D.3
9. If the inclination of the straight line is, then ()
A. equal to 0 b equal to c equal to d does not exist.
10. If θ∈R is known, the inclination range of the straight line is ().
A.[0，30 ] B. C.[0，30 ]∪ D.[30， 150 ]
1 1. Set to odd function, which is the subtraction function. . Then the solution set is ()
A.B. C. D。
12. If ab >；; 0, the slope of the straight line AX+BY+C = 0 is α, and SIN =-, then the slope of the straight line is equal to ().
A.b-c-d。
13. The inclination angle of the straight line is ()
a . 200 b . 1600 c . 700d . 1 100
14. The range of linear inclination angle α is.
15. If the inclination of the straight line L is α= 1200, the slope of the straight line L is equal to _ _ _ _ _ _ _.
16. If the inclination angle α of the straight line satisfies < Tan, then the value range of α is _ _ _ _ _ _ _.
17. The straight line L passes through point A (0, 1) and point B (-2,-1), and the straight line L rotates 450 counterclockwise around point A, then the slope of L' is _ _ _ _ _ _ _.
18.( 1) If and only if m is what value, the slope of the straight line passing through two points A(-m, 6) and B( 1, 3m) is 12.
(2) If and only if m is a value, the inclination of the straight line passing through two points A(m, 2) and B(-m, 2m- 1) is 600.
19.( 1) If (2, 3), (3, a) and (4, b) are on the same straight line, find the relationship between A and B; (2) It is known that three points A(a, 2), B(3, 7) and C(-2, -9a) are on a straight line, and the value of the number A is realistic.
20. In the rectangular coordinate system, if the three vertices A (0 0,3), B (3 3,3) and C (2 2,0) are divided into two parts with equal areas, find the value of the number.
2 1. Given two points A (3,2) and B (-4, 1), the straight line passing through point C(0,-1) has a common point with line segment AB, and the range of straight line slope k is found.
Reference answer:
Classic example:
Solution: slope of straight line AB K 1 =1/7 >; 0, so its inclination α is an acute angle;
The slope k2 of the straight line BC =-0.5
The slope K3 of the straight line CA = 1 >: 0, so its inclination angle α is an acute angle.
Classroom exercises:
1.a； 2.c； 3.c； 4.a； 5.b； 6.d； 7.d； 8.c； 9.c； 10.c； 1 1.c； 12.b； 13.d； 14.00? a & lt 1800; 15.-; 16.300α& lt； 600; 17. It does not exist;
18.( 1) From the meaning of the question, the solution is m =-2; (2) from the meaning of the question, the solution.
19.( 1) If we know the three-point * * line according to the meaning of the question, there will be, that is, 2a-b=3.
(2)kAB=, kAC=, ∫a, B, C are on a straight line, ∴ KAB = KAC.
20. solution: the intersection of a straight line with AC, d and AB.
solution
2 1. solution: according to the graph, when the straight line passing through c intersects with the line segment AB, k >；; or