In the plane rectangular coordinate system, if the known point (1-2a, A-2) is in the third quadrant and a is an integer, then the value of a is______ ．

In the plane rectangular coordinate system, if the known point (1-2a, A-2) is in the third quadrant and a is an integer, then the value of a is______ ．

∵ point (1-2a, A-2) is in the third quadrant, ∵ 1-2a < 0, A-2 < 0, the solution is: 0.5 < a < 2, ∵ A is an integer, ∵ a = 1

If point P (1-2a, B + 2) and point Q (3, - 1) are symmetric about X axis, find the value of a and B
If point P (1-2a, B + 2) and point Q (3, - 1) are symmetric about X axis, find the values of a and B
If point P (1-2a, B + 2) and point Q (3, - 1) are symmetric about the Y axis, find the values of a and B

(1) On X-axis symmetry 1-2a = 3, B + 2 = 1, a = - 1, B = - 1
(2) On Y-axis symmetry 1-2a = - 3B + 2 = - 1A = 2B = - 3

Point P is a point on the positive half axis of Y-axis and the distance to x-axis is 3. If point P moves to Q along the negative half axis of x-axis at a unit length per second, the area of quadrilateral abpq is 15 square units. Write the coordinates of Q at this time

How do I know which points a and B are? If a is the origin, B also has the same abscissa with Q
So the abscissa of Q is - 15 / 3 = - 5
So time t = 5
The coordinates of Q are (- 5,3)

If point P is in the third quadrant and 5 unit length from x-axis and 3 unit length from y-axis, then point P ()
If point q is in the fourth quadrant, and each unit length is from X-axis 1 and 4 units length is from y-axis, then point Q ()
If the point R is on the Y-axis and 6 units from the origin, then the point R () or ()

P(-3,-5)
Q(4,-1)
R(0,6)(0,-6)