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cho phan so a/b co gia tri la 12/54 va ucln (a,b)=12 voi a,b thuoc N
Tim phan so a/b thoa man:
Phan so a/b=45/100 va UCLN(a,b)=13
tim phan so \(\frac{a}{b}\)phan so \(\frac{45}{125}\)va UCLN(a;b)=11
tim \(\frac{a}{b}\)
1,tim 2 so tu nhien biet tong chung = 66 UCLN=6 co 1 so chia het cho 5
2,tim 2 so tu nhien biet hieu chung = 84 UCLN = 12
3,tim 2 so tu nhien biet tich = 864 UCLN=6
4,cho 3n+1 va 5n+4 la 2 so nguyen to cung nhau tim UCLN cua 3n+1 va 5n+4
5,cho a=123456789;b=987654321 . Tim UCLN cua a va b
tim phan so a/b biet a/b=21/35 va ucln (a,b)=20
tim mot phan so bang phan so 15/16 biet ucln tu va mau cua phan so do bang 24
tim 2 so tu nhien a va b (a>b),biet rang a+b=270 va UCLN(a,b)=45
Tim UCLN bang cach phan tich ra thua so nguyen to va bang thuat toan Oclit
a, 852 va 192
b,900 ; 420 va 240
tim ucln cua
12 va 25
90 va 120 23 va 45