设集合A={1,a},则P(A)=()
A: {{1},{a}}
B: {,{1},{a}}
C: {,{1},{a},{1,a}}
D: {{1},{a},{1,a}}
A: {{1},{a}}
B: {,{1},{a}}
C: {,{1},{a},{1,a}}
D: {{1},{a},{1,a}}
举一反三
- 单选题 ( 2.5 分 )<br/>设集合A={1,a},则A的幂集P()=( )? A: {{1},{a}} B: {∅,{1},{a}} C: {∅,{1},{a},{1,a}} D: {{1},{a},{1,a}}
- 设集合A={1,2},则P(A)= ____? A: {{1},{2}} B: {{1},{2},{1,2}} C: {∅,{1},{2},A} D: {∅,{1},{2}}
- 若集合A={1,{2} },集合B={1,2},则P(A)-P(B)= ( )。 A: {Φ,{1}} B: {{1},{1,{2}}} C: {{1,{2}}} D: {{{2}},{1,{2}}}
- 设集合A = {1, a }，则P(A) =
- 设集合A= {1,{2,3}}，Φ是空集，则A的幂集P(A)= { Φ, {1}, {{2,3}}, {1,{2,3}} }