ข้อใดถูกต้องบ้าง เมื่อกำหนดให้ A = { 1 , 2 , { 3 } , { 4 , 5 } } A=\left\{1,2,\left\{3\right\},\left\{4,5\right\}\right\} A = { 1 , 2 , { 3 } , { 4 , 5 } }

{ } ⊂ A \left\{\right\}\subset A { } ⊂ A

{ { 4 , 5 } } ⊂ A \left\{\left\{4,5\right\}\right\}\subset A { { 4 , 5 } } ⊂ A

{ 2 , { 3 } } ⊂ A \left\{2,\left\{3\right\}\right\}\subset A { 2 , { 3 } } ⊂ A

{ 3 } ⊂ A \left\{3\right\}\subset A { 3 } ⊂ A

ข้อใดถูกเกี่ยวกับ A = { 1 , 2 , { 3 , 4 } , 5 } A=\left\{1,2,\left\{3,4\right\},5\right\} A = { 1 , 2 , { 3 , 4 } , 5 } บ้าง

1 ⊄ A 1\not\subset A 1  ⊂ A

{ 1 , { 3 , 4 } } ⊂ A \left\{1,\left\{3,4\right\}\right\}\subset A { 1 , { 3 , 4 } } ⊂ A

n ( A ) = 5 n\left(A\right)=5 n ( A ) = 5

{ 3 , 4 } ⊂ A \left\{3,4\right\}\subset A { 3 , 4 } ⊂ A

เซต Pre-Part1

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Mathematics

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Hard

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เซต Pre-Part1

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A={1,2,3,{3}} จะมีสับเซตทั้งหมดกี่สับเซต

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ข้อใดถูกต้องบ้าง
เมื่อกำหนดให้ $A=\left\{1,2,\left\{3\right\},\left\{4,5\right\}\right\}$

$1\subset A$

$\left\{3\right\}\subset A$

$\left\{\left\{4,5\right\}\right\}\subset A$

$\left\{\right\}\subset A$

$\left\{2,\left\{3\right\}\right\}\subset A$

Multiple Select

ข้อใดถูกเกี่ยวกับ $A=\left\{1,2,\left\{3,4\right\},5\right\}$

บ้าง

$n\left(A\right)=5$

$1\not\subset A$

$\left\{3,4\right\}\subset A$

$\left\{1,\left\{3,4\right\}\right\}\subset A$

A มีสับเซตแท้ทั้งหมด

เซต Pre-Part1

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