Send some problems in higher mathematics free time to do a do, not what you can not learn. Mathematics is not, that does not
Problem 1-1-- spatial Cartesian coordinate system:
1. Research coordinates of the feature space Cartesian coordinate system in various kinds of octants point, noting that each of the following points which octant
A(1,-2,3), B(0,4,3), C(2,-3,-4), D(-2,-3,-1), E(1,2,4)
2. Study of coordinate points in the coordinate plane of each coordinate axis and what characteristics, which noted the following coordinate plane the coordinate axis in which or
A(3,4,0), B(0,4,3), C(3,0,0), D(0,-1,0), E(0,0,7)
3. point (a, b, c) on the coordinate plane, each of the axes, what the coordinates of the coordinate origin symmetry?
4. For a point M in the space, if done through M perpendicular to a straight line, called pedal point projection point M on the straight line; if done through M perpendicular to a plane, called pedal point M in the plane of projection point; find the point (a, b, c) coordinates of the respective coordinate axes of the coordinate plane and the projection points
5. seeking vertices A (2,5,0), triangle B (11,3,8), C (5,1,11) of the length of each side.
6. Points by A (4, -3,5) to the distance of each coordinate axis, i.e., from point A seek its coordinate axes projection points