Because if you pass-1 2 and put the point in, B will be satisfied.

8, P:X=3, q:x=3 or 4.

P can deduce q, and q does not necessarily deduce p.

A necessary and sufficient condition for p to be q

choose one

9, the derivative of fx is 20 15+lnx.

Substitute x, that is, 20 15+lnx=20 15.

So x= 1.

Choose B.

10A is not necessarily true. There may be two perpendicular faces.

1 1. This is a prism. s = 3 * 5+4 * 5+5 * 5+ 1/2 * 3 * 4 * 2 = 72

12, center (0.0), radius 1. The distance from the tangent to the center of the circle is equal to the radius 1, and the intersection points of the tangent and the coordinate axis are (1.0) respectively. (0. 1), AB= root number 2.