Tim stn n có 2 chu so sao cho 2n la binh phuong cua 1 stn,3n la lap phuong cua mot stn
cho n la so tu nhien,tim so nguyen to p co 2 chu so sao cho p = ƯCLN(2n-3 ; 3n+15)
tim stn nho nhat co 15 uoc so biet rang so do chi co 2 uoc nguyen to la 3 va 5
mik can gap
ai nhanh mik tik cho
1.tim STN n sao cho 2n+3 chia het cho 2n-1
2.tim STN a va b biet a.b=48 va UCLN(a, b)=2
tim n thuoc Z de
a)n+3/n-2 la so nguyen am
b)n+7/3n-1 la so tu nhien
c)3n+2/4n-5 la so tu nhien
d)15/n ; 12/n+2 va 6/2n-5 deu la so nguyen
ai giai duoc,trinh bay day du mik tick cho(mik can gap)
bai 1:tim n thuoc n de:3(n+2) chia het cho n-2
bai 2chng minh rang cac so sau la cac so nguyen to cung nhau
a) 18n+3 va 21n+4
b)2n+1va3n+1
bai 3:tim hai so biet tong hai so la 90 va uoc chung lon nhat la 15
bai 4:tim so tu nhien n lon nhat co 3 chu so sao cho n :15 du 9va n:35 du 29
bai 5:tim uoc chung lon nhat cua cac so sau:
a)18n+3 va 21n+4
b)9n+13 va 3n+4
bai 6:chung minh: voi moi a,b thuoc nta co
UCLN(a,b)=UCLN (5a+2b,7a+3b)
AI DUNG TRUOC 9H MINH SE TICH CHO.THANHK YOU VERY MUCH!
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
biet a,b la 2 so nguyen to ko cung nhau thoa man a=2n+3;b=3n+1.Khi do UCLN(a,b)=.....?
nhanh len nha mk dang can gap
luu y: ko tra loi bang chtt hay cau hoi tuong tu
tim stn n sao cho 4n+3 chia het cho 2n-6
help mih di!!!!!!!!mih dang gap nhe!@
