Proposition intention This topic mainly examines the three views of simple geometry and its volume calculation, which is a simple topic.
The intention of the proposition can be known from the three views. This geometry is the center of a cuboid with a length of 4, a width of 3 and a height of 1 Remove the cylinder with radius of 1, and the surface area is
14. It is known that the geometric series is an increasing series, and the general formula of the series is _ _ _ _ _ _ _ _.
Proposition intention This topic mainly examines the general formula and equation thought of geometric series, and is a simple topic.
Let the common ratio of geometric series be set analytically, and then we can get it, get it and know it, so, because it is an increasing series,
15. It is known that there are two points on a parabola, and the abscissas of each point are respectively, and the tangents of the parabola intersect respectively, so the ordinate of point A is.
Propositional intention This question mainly investigates the intersection of the tangent of a parabola and two straight lines, which belongs to the middle-level question.
Analysis, so the tangent equation with the point as the tangent point is, the tangent equation with the point as the tangent point is, and the two equations are simultaneous.