A.y=与y=x | B.y=与y=|x| |
C.y=|x|与y= | D.y=与y= |
x | 1 | 2 | 3 |
f(x) | 2 | 3 | 1 |
x | 1 | 2 | 3 |
g(x) | 1 | 3 | 2 |
x | 1 | 2 | 3 |
g[f(x)] | | | |
A.①②③④ | B.①②③ |
C.②③ | D.② |
A.3.71元 | B.3.97元 |
C.4.24元 | D.4.77元 |
每间住房定价(元) | 90 | 80 | 70 | 60 | 50 |
每天住房率(%) | 50% | 60% | 70% | 80% | 90% |
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