1. Given the set a = {x | x2 | 5x | 6 = 0}, then a? N*=()
A.{6} B.{﹣ 1} C.{ 1} D？
2. If the set is known, then ()
A.B. C. D。
3. Given f(x)=, if the range of f(x) is (? , 3), then the range of real number A is ()
A.(﹣? ,﹣2)? (2,+? )b。
C.D. 18。 ﹣ 1 19.(-? ,2) 20.④
Third, answer questions.
2 1. solution: when m+ 1 >; 2m ~ 1, that is, m.
When m+ 1 = 2m- 1, that is, m=2 and B=3, which one satisfies b? A, namely m = 2；;
When m+ 1; 2 o'clock, by b? A, you get 2.
To sum up: what is the range of m? 3.
22. solution: if p is true, then f (x) = (2a-6) x monotonically decreases on r,
? 0 & lt2a﹣6<； 1, and 2a ~ 6? 1
? 3 & lta & ltp = " " & gt& lt/a & lt； & gt
If q is true, let f (x) = x2-3ax+2a2+ 1, then it should be satisfied.
a & gt,
The meaning of the question should be p true q false or p false q true.
① If P is true and Q is false, then A has no solution.
② If P is false and Q is true, then
?
23.
24. Solution: (1)∫f(x)=,? ,
Judging from the meaning of the question, (=), the solution is a= 1.
(2) from (1), (x >；; 0),
When x? (0， 1)，f？ (x)>0, f(x) is increasing function,
When x? ( 1,+? )，f？ (x)& lt； 0, f(x) is a decreasing function,
? When x= 1, f(x) gets the maximum value f( 1).
The function f(x) has an extreme value in the interval (m, m+ 1).
? m & lt 1 & lt； M+ 1，0
? The range of the real number m is (0, 1).