\(\frac{a}{b}=\frac{15}{35}\) va \(UCLN\left[a;b\right].BCNN\left[a;b\right]=3549\)
tim phan so a/b biet a/b=21/35 va ucln (a,b)=20
tim a,b thuoc tap N biet UCLN(a,b)=1 va\(\frac{5a+7b}{6a+5b}\)= \(\frac{29}{28}\)
\(\frac{5a+7b}{6a+5b}=\frac{29}{28}\)
=> 5a + 7b = 28
va 6a + 5b = 29
=> a = 3 va b = 2
\(\frac{5a+7b}{6a+5b}=\frac{29}{28}\)
=> 5b + 7b = 28
và 6a + 5b = 29
=> a = 3 và b = 2
tim hai so tu nhien a va b ; biet a + b = 180 va UCLN ( a , b ) = 15
tim cac STN a va b biet
a*b=1350 va UCLN(a;b) =15
tim hai so a va b biet a.b=2250va UCLN(a,b)=15
tin 2 so a va b biet rang a.b=1176;BCNN(a,b)=84 va a>b
cho a/b=15/35,biet UCLN(a,b).BCNN(a,b)=3549
tim (a,b)
Tim hai so a va b biet tong cua BCNN va UCLN cua chung la 15.
tim a,b,c biet\(\frac{1}{2}a=\frac{2}{3}b=\frac{3}{4}c\) va a-b=15
Ta co:a-b=15
=>2(a-b)=30 hay 2a-2b=30
Co:\(\frac{1}{2}a=\frac{2}{3}b=\frac{3}{4}c\)
\(hay\frac{2a}{4}=\frac{2b}{3}=\frac{3c}{4}\)va 2a-2b=30
Ap dung tinh chat cua day ti so bang nhau ta co:
\(\frac{2a}{4}=\frac{2b}{3}=\frac{3c}{4}=\frac{2a-2b}{4-3}=\frac{30}{1}=30\)
Con lai la tu ban nhe
ko hieu hoi mik
mik san sang giup