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0
2024-05-31 09:07:02
Phùng Minh Đức làm sai r nhé
2024-05-31 09:03:45
152-y-12=93
152-(y+12)=93
y+12=152-93
y+12=59
y=59-12=47
Vậy y=47
TICK ĐÚNG CHO CHỊ VỚI EM NHÉ!!!
2024-05-08 20:54:35
để 3n-4/n+1 nhận g/trị nguyên thì,
{3n-4 chia hết cho n+1
{3n+3)-7 chia hết cho n+1
mà lại có 3n+3 chia hết cho n+1 nên
-7 chia hết cho n+1 nên :
n+1 thuộc ước của 7(vì ước của 7 cũng là ước của -7)
nên n+1 thuộc{1,-1,7,-7}
nên n thuộc{0,-2,6,-8}
(tick cho mik với nha)