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- A= {1,2 3,4,a,b}B= {a, b, c, 1,2 } (universal set)(sub set) (real sub set) (nul set) (power set)

U={1,2,3,4,a,b,c}

A= {1,2 3,4,a,b}B={a,b.c,1,2}

? U ? ? A= { a,b,c,d,e}