a)tìm so co 2 chu so ab biết a+b=12 và ab -36=ba
b)tim so co 3 chu so abc biet
204-abc=a+b+c
tim so tu nhien abc biet (a+b+c)3=abc va a,b,c la 3 chu so khac nhau
tim so co 3 chu so biet abc:11=a+b+c
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.
tim cac so abc biet rang voi a,b,c khac nhau sao cho abc :(a+b+c)=25
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
giai giup bai nay tim 3 so a,b,c biet (a+b+c)^3=abc (co dau gach tren dau) .giai can ke ra dum nha
Tim cac chu so a,b,c,d biet a× bcd×abc=abcabc
