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排列的规律,第行()从左向右的第3个数
为
(1)设A={4,5,6,8},B={3,5,7,8},求A∪B.
(2)设集合A={x|-1<x<2},集合B={x|1<x<3},求A∪B.
(1)
[
A
B
C
D
(2)
(1)=_________(C为常数);
(2)(xn=_________;
(3)(sinx=_________;
(4)(cosx=_________;
(5)(ex=_________;
(6)(ax=_________;
(7)(lnx=_________
8)(logax)=_________;
(9)(xα=_________.