निम्लिखित समुच्चयों के घात समयच्ची (power set) ज्ञात कीजिए।
`A={phi}," " B= {phi,{phi}}," "(iii) C={1,2{3,4}}`

Explanation

`P(A) = {X:X subeA}={X:X= phi,X=A}={phi,{phi}}`
`P(B)={X:XsubeB}={phi,{phi},B,{ {phi}}}`
`P(C)={X:X subeC}={phi,{1},{2},{ {3,4},{1,2},{1,{3,4}},{2{3,4}},C}`