已知幂函数y＝f（x）的图象过点
，则f（2）＝_______
函数y＝
的定义域是________
27
＋lg4＋2lg5＝__________
A semipro baseball league has teams with 21 players each. League rules state that a player must be paid at least ＄15，000，and that the total of all players’ salaries for each team cannot exceed ＄700，000. What is the maximum possible salary，in dollars，for a single player？
A. 270，000 B. 385，000 C. 400，000 D. 430，000 E.700，000
当0<a<1时，下列不等式成立的是
A. a
<a
B. log
0.1>
log0.2
C. a
<a
D. log2<
log3
函数f（x）＝log
（x－2）＋3，a>0，a
1的图像过点（4，
），则a的值为
A. 
B. 
C.
4 D. 
