Fill in the blanks in four groups:124n2y ≥ 2x/5 (-2,2) √15 (50,60).

18 0.3 0.6

19 1/6 60 degrees

The center of 20 is (-5pie/9+5kie/3,0), and the symmetry axis x = 5pie/18+5kie/3k has a minimum value of 32.

2 1 a=-2 Question 2 Sorry, I can't see the answer clearly.

22 ( 1-m)x^2+y^2= 1-m

1.m = 0 circle

⒉m<； 0 ellipse with focus on y axis

⒊0<； M< 1 ellipse with focus on x axis

2.m = 1 x axis

⒌m>； 1 hyperbola with focus on x axis

Centrifugal rate (√ 6/3, 1)