y=2^|x|
|x|>=0,
y>=2^0=1
值域为:y>=1
猜你喜欢
- 11234这四个数改变顺序可以排列成多少个四位数、三位数、两位数,
- 2She lives on the _______ (three) floor.用括号中所给的单词的适当形式填空
- 3一根长2米的长方体钢材,沿横截面截成两段后,表面积增加0.6平方分米,这段长方体钢材的体积是立方分米.14.
- 4用word2007打完英文单词后,怎样把它们按首字母的字母表顺序排列?
- 5Scarcely ______ asleep when a knock at the door awakened her
- 6长江之歌 表达了作者怎样的感情?
- 7Not until the meeting was over ____ that he had made a mistake in his speech
- 8乘号和除号用键盘怎么打?
- 9把一根木料锯成5段用了8.4分钟.如果用同样的速度把着跟木料锯成10段,要用多少分钟?
- 10英语里不可数名词后的动词后面用单数还是复数