A:as soon a
B:while
C:because
D:after
实数m取什么数值时,复数z=m+1+(m﹣1)i分别是:
(1)实数?
(2)虚数?
(3)纯虚数?
x
﹣1
0
1
2
3
ex
0.37
2.72
7.39
20.09
x+2
4
5