∵4-2x≥0,
∴2x≤22
考察指数函数y=2x,它在R是增函数,
∴x<2,
函数y=4-2x的定义域是(-∞,2]
故答案为(-∞,2].
—Would you like _____ us to play football?
—I'd like to.[ ]
A. join
B. to join
C. to take part in
D. take part in
调节力等于()
A.调节幅度的倒数
B.调节远点的倒数
C.调节范围的倒数
D.屈光度的倒数
E.调节近点的倒数