UCLN ( a,b)=15
=>a=15k
b=15q
(k,q)=1
\(\frac{a}{b}=\frac{15k}{15q}=\frac{k}{q}=\frac{85}{153}=\frac{5}{9}\)
Vì (k,q)=1 nên k=5 , q=9
a=15.5=75
b=15.9=135
biet UCLN(a,b)=15. tim UCLN(A+B,a-b)
cho a/b=15/35,biet UCLN(a,b).BCNN(a,b)=3549
tim (a,b)
tim a,b
a- b = 90 va UCLN a,b = 15
BCNN(a,b)=300
UCLN(a,b)=15
Va a+15=b
tim a b
tim cac STN a va b biet
a*b=1350 va UCLN(a;b) =15
tim BCNN cua a,b =300
UCLN cua a va b =15
a, ab = 360 va BCNN[ a;b] = 60
b, UCLN[a:;b] =12 va BCNN[a;b] = 72
c, UCLN[a;b] = 15 va BCNN[a;b]=2100.UCLN[a;b]
Tim 2 so tu nhien a va b biet :
BCNN ( a , b) = 300 ; UCLN (a , b) = 15