A) A= { x thuộc N / x = ab, a = 3b}
b) B= {x thuộc N / 20 chia hết x }
c) C= {x thuộc N / x...
Mathematics, 31.01.2022 01:00 zarrialamons16
A) A= { x thuộc N / x = ab, a = 3b}
b) B= {x thuộc N / 20 chia hết x }
c) C= {x thuộc N / x chia hết 2 và 30 < x < 46 }
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