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tim x dua vao quan he uoc boi:tim so tu nhien x sao cho x-1 la uoc cua 12tim so tu nhien x sao cho 2x+1 la uoc cua 28tim so tu nhien x sao cho x+15 la boi cua x+3tim cac so nguyen x,y sao cho (x+1)(y-2)3tim so nguyen x sao cho(x+2).(y-1)2tim so nguyen to x vua la uoc cua 275 vua la uoc cua 180tim so nguyen to x,y biet x+y12 va UCLL (x:y)5tim so tu nhien x,y biet x+y32 va UCLL (x:y)8tim so tu nhien x biet x chia het cho10; xchia het cho12; x chia het cho15 va 100x150tim so x nho nhat khac 0b biet...
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tim x dua vao quan he uoc boi:
tim so tu nhien x sao cho x-1 la uoc cua 12
tim so tu nhien x sao cho 2x+1 la uoc cua 28
tim so tu nhien x sao cho x+15 la boi cua x+3
tim cac so nguyen x,y sao cho (x+1)(y-2)=3
tim so nguyen x sao cho(x+2).(y-1)=2
tim so nguyen to x vua la uoc cua 275 vua la uoc cua 180
tim so nguyen to x,y biet x+y=12 va UCLL (x:y)=5
tim so tu nhien x,y biet x+y=32 va UCLL (x:y)=8
tim so tu nhien x biet x chia het cho10; xchia het cho12; x chia het cho15 va 100<x<150
tim so x nho nhat khac 0b biet x chia het cho 24 va 30
40 chia het cho x . 56 chia het cho x va x>6
Tim hai so nguyen to x va y sao cho : x2-6y2=1
tim so nguyen to x va y sao cho x^2 + 45 = y^2
1,Tim cac so nguyen x va y sao cho (x-2)(y-1) =5.
2,Tim so nguyen n sao cho n+5 chia het cho 2n-1
tim 2 so nguyen to x va y sao cho x.x-6.y.y=1 ghi loi giai cho to
tim cac so nguyen to x va y sao cho cac so 5x+y va xy+13 cung la so nguyen to
giai nhanh giup minh nha mai minh phai nop roi
tim x va y la so nguyen to ma x^2=8.y+1 . SKT_TT giups to
tim so nguyen to p sao cho p^2+1 va p^4+1 la so nguyen to
tim so nguyen to p sao cho p^2+1 va p^4+1 la so nguyen to.