BCNN[a,b] = 240 va UCLN[a,b] = 12
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giai giup minh nhe
bai 1 a )tim ucln(6n+3,6n+9)
b)tim ucln (2n-1;9n+4)
bai2 tim a;b thuoc n biet
bcnn(a;b)=240
ucln(a;b)=16
bai 3 tim so chia va thuong cua 1 phep chia biet so bi chia la 145 du 12 thuong # 1
Tim 2 so a va b biet UCLN(a,b)=12;BCNN(a,b)=72
tim so tu nhien a,b > 0 biet UCLN(a,b)=16, BCNN ( a ,b)= 240
Ta có : a.b =UCLN.BCNN = 16.240 =3840
Vì UCLN(a;b) = 16 => a =16q; b =16p với (q;p) =1
=> 16q.16p =3840
=> qp =15 =1.15 =3.5
+q=1 =>a =16 ; p =15 => b=240
+q=3 => a=48 ;p=5 =>b =80
Vì a;b có vai trò như nhau
(a;b) =(16;240);(240;16);(48;80);(80;48)
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Biet rang : BCNN(a,b).UCLN(a,b)
a, BCNN cua hai so la 600, UCLN cua chung nho hon 10 lan BCNN. So thu 1 la 120, tim so thu 2.
b, UCLN cua hai so la 12, BCNN cua chung lon gap 6 lan UCLN . So t 1 la 24, tim so t 2
c, Tong cua hai so bang 60, tong giua UCLN va BCNN cua chung la 84. Tim hai so do.
Tim 2 stn a va b biet UCLN(a,b)=12, BCNN(a,b)=756
HELP ME
tim a va b biet
A,a+b=128 va UCLN cua chung =16
B,UCLN cua a,b va BCNN cua chung =36
tim (a,b) thuoc n*biet;b ,a/b=4/5 va BCNN=140 ;; a+b=128 va UCLN =16
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
tim hai so tu nhien a,b biet
BCNN(a,b)=192 va UCLN(a,b)=16