Question

設(shè)集合u={(x,y)|x∈R,y∈R},A={(x,y)|2x-y+m＞0},B={(x,y)|x+y-n≤0},那么點(diǎn)P(2,3)∈A∩(B)的充要條件是(　　)

A.m＞-1,n＜5

B.m＜-1,n＜5

C.m＞-1,n＞5

D.m＜-1,n＞5

Answer 1

解析：∵B={(x,y)|x+y-n≤0},B={(x,y)|x+y-n＞0},P(2,3)∈A∩(B),

∴

∴m＞-1,n＜5.

答案：A