tim hai so nguyen duonga;b biet a/b=10/25 va BCNN(a;b)=100
tim 2 cs nguyen duong a;b sao cho a/b = 10/25 va BCNN(a;b) =100
tim 2 so nguyen duong a;b biet 2a-3b=100 va 15. BCNN(a;b)+8. UCLN(a;b)=1950
lam nhanh giup minh nha !! thank you verry!!
cho a va b la 2 so nguyen duong ko chia nhet cho nhau biet BCNN a b la 630 UCLL a b la 18 tim hai so a b
Bai1:cmr 2 stn dang 2n+3 va 3n+2 bao gio cung la 2 so nguyen to cung nhau.
Bai 2:tim 2 chu so a ; b biet (a+b)(a-b)=20.
Bai 3: tim 2 stn lien tiep co 2 chu so sao cho 1 so chia het cho 25, so kia chia het cho 4.
Bai 4: tim a;b biet a.b=360 va BCNN(a,b)=60
cho a va b la 2 so nguyen duong khong cia het cho nhau.biet BCNN(a,b)= 630va UCLN(a,b)=18.Tim 2 so ava b
tim 2 so nguyen duong a,b biet a/b=2,6 va ucln = 5
Tim cac so nguyen duong a,b,c biet rang:a^3-b^3-c^3=3ab va a^2=2(b+c)
1 . Tìm 2 so tu nhien co tich bang 300 , ƯCLN bang 5
2 . Tim 2 so tu nhien a,b biet a + b = 66 , ƯCLN ( a , b ) = 6 . Trong do co 1 so chia het cho 5 .
3 . Tim cac so tu nhien a,b biet : UCLN(a,b) = 5 , BCNN(a , b) = 105
Chung minh : a x b = UCLN (a,b) x BCNN (a,b)
4 . Tim 2 so tu nhien a va b biet :
a x b = 360 ; BCNN ( a , b ) = 60
5 . Cho a va b la 2 so nguyen to cung nhau , chung minh rang cac so sau cung la 2 so nguyen to cung nhau :
a ; a va a +b b ; \(a^2\)va a + b c ; a x b va a + b
Giup minh lam cho xong nha , mot nop roi
