1. The inclination of the straight line (root number 3)*x-y+ 1=0 is (root number 3).

2. In the sequence {a subscript n}, a subscript 1= 1, a subscript n+1–a subscript n = 2, then the value of a subscript 5 1 is (1).

3. Given x>0, the minimum value of the function y=(4/x)+x is (4).

4. In △ABC, a=3, b= radical number 19, and c=2, then b = (-2π/3).

5. If the ratio of the truncated cone to the upper and lower grounding radii of the bus is 1: 4: 5 and Galway is 8, its lateral area is (60π).

6. A straight line that passes through point m (1, 1) and the intercepts of two axes are equal is (y=x or y=-x+2).

7. Give the following four propositions: ① Two straight lines in two planes must be straight lines in different planes; ② The straight line in a plane and the straight line out of this plane are not necessarily non-planar straight lines; (3) Two straight lines intersecting with two straight lines with different planes must be straight lines with different planes; (4) The two intersecting lines must not be non-coplanar lines. Among them, the number of errors is (2) (the second and fourth items are correct).

8. It is known that arithmetic progression {a subscript n} satisfies a subscript 5+a subscript 6 = 28, so the sum of the first 10 terms is (140).

9. The straight line L intersects with the straight lines y= 1 and x-y-7=0 at the bright points P and Q respectively, and the midpoint coordinates of the straight line PQ are (1,-1), so the slope of the straight line L is (-2/3).

10. In geometric series, if a subscript 1 = 1/2, q= 1/2 and a subscript n= 1/32, then the number of terms of n is (5).