1.已知集合A={x|y=$\sqrt{x+2}$},若函数f(x)=-x,x∈A,则f(x)的值域为( )
0 249904 249912 249918 249922 249928 249930 249934 249940 249942 249948 249954 249958 249960 249964 249970 249972 249978 249982 249984 249988 249990 249994 249996 249998 249999 250000 250002 250003 250004 250006 250008 250012 250014 250018 250020 250024 250030 250032 250038 250042 250044 250048 250054 250060 250062 250068 250072 250074 250080 250084 250090 250098 266669
A. | R | B. | [2,+∞) | C. | (-∞,-2] | D. | (-∞,2] |