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tim so abc biet 30 phan muoi ba =a+1 phan b+1phan9
Tim so tu nhien abc biet 1/a + 1/b + 1/c = 1
bai 1 tim so tu nhien co 4 chu so ab cd biet abcd+abc+ab+a=4321.tim abcd
bai 2 cho m , n la cac so tu nhien va p la so nguyen to thoa man 9/m-1=m+n/p. tinh A= p^2-n
bai 3 tim so co 3 chu so biet abc 1000/a+b+c=abc.
a)so sanh E=2018^99-1/2018^100-1 va F=2018^98/2018^99-1
b)Tim so nguyen to ab (a>b>0),biet ab-ba la so chinh phuong
c)Cho abc la so tu nhien co 3 chu so .Tim gia tri lon nhat cua A={abc/a+b+c}+1918
a, tim a thuoc N biet 6a+13 chia het cho 2a+1
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b, tim n de [n+10].[n+21]=124689
c, tim cac chu so a,b biet aabb la so chinh phuong
Tim cac so a, b, c biet a + b = 12; b + c = 13; c + a = -15
tim cac so a;b;c biet a+b=12;b+c= 13; c+a= -15. Cac so a;b;c lan luot la
tim so abc voi(b khac c) biet abc va (a+b+c) chia het cho 7
giải chi tiết nha nếu ma dung thi 1 like OK
tim 3 so a,b,c biet : 204 - abc = a + b +c