A={1,3,5,7} B{1,4,7} C={2,5,7,8,}A↓B{1,3,5,7}↓{1,4,7}={1,7} A↑B={1,3,5,7}↑{1,4,7}={1,3,4,5,7}特殊符号↑ ↓{A↑C}↓B=?

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A={1,3,5,7}B{1,4,7}C={2,5,7,8,}A↓B{1,3,5,7}↓{1,4,7}={1,7}A↑B={1,3,5,7}↑{1,4,7}={1,3,4,5,7}特殊符号↑↓{A↑C

A={1,3,5,7} B{1,4,7} C={2,5,7,8,}A↓B{1,3,5,7}↓{1,4,7}={1,7} A↑B={1,3,5,7}↑{1,4,7}={1,3,4,5,7}特殊符号↑ ↓{A↑C}↓B=?
A={1,3,5,7} B{1,4,7} C={2,5,7,8,}
A↓B{1,3,5,7}↓{1,4,7}={1,7}
A↑B={1,3,5,7}↑{1,4,7}={1,3,4,5,7}
特殊符号↑ ↓
{A↑C}↓B=?

A={1,3,5,7} B{1,4,7} C={2,5,7,8,}A↓B{1,3,5,7}↓{1,4,7}={1,7} A↑B={1,3,5,7}↑{1,4,7}={1,3,4,5,7}特殊符号↑ ↓{A↑C}↓B=?
{1,2,3,5,7,8}↓{1,4,7}={1,7}

1,7

{1,7}

{1,2,3,5,7,8}↓{1,4,7}={1,7}