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Phương Minh
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2023-09-24 20:59:30
Cho dãy số 1;4;7;10;13;..;x, biết dãy số có 100 số a,tìm x b, tính tổng của dãy số
Cho dãy số 1;4;7;10;13;..;x, biết dãy số có 100 số a,tìm x b, tính tổng của dãy số