Co ai giup tui hong? Tui k cho. Cam on trc. Thanks.
Các câu hỏi tương tự
Cho a,b,c la cac so nguyen duong.CMR: P=a/a+b + b/b+c + c/a+c khong la 1 so nguyen (dau "/" la dau gach phan so nhe) GIUP MIK VS MIK DANG CAN GAP BN NAO GIAI DC MIK TICK NHA! help me
bai 1 : cho 21 so nguyen trong do tong 5 so bat ki la 1 so duong. cmr tong 21 so nguyen do la 1 so duong.
giup mk nha mina.....mk tick cho ban nao giai dung nhat ( ghi ro cach trinh bay nhe)
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)
Cho bieu thuc B= 7/ n -7
a) So nguyen n phai co dieu kien gi de B la phan so.
b) Tim phan so B biet n = -7
c) Tim cac so nguyen n de B la so nguyen.
bn nao co loi giai chi tiet bai nay mk se tick,vi mk dung dien thoai ko viet dau dc nen cac ban thong cam nha.
trong ba so nhuyen a,b,c co mot so nguyen duong va mot so nguyen am, mot so =0 ngoai ra con biet them rang |a|=b^2.(b-c). Hoi so nao am so nao duong , so nao =0
Cho day so : 1;4;7;10;...
a. Neu quy luat cua day so do .
b. So 31 co phai la so hang cua day khong ?
c. So 2009 co thuoc day nay khong ? Vi sao ?
Ai giai nhanh nhat mik se tick ... :))))
so nguyen duong x thoa man la ? biet x/9<7/x<x/6
GIUP MIK NHA
Mik se tk cho ai ma giai dung
(nho la giai chi tiet ra nhe)
1)chung to rang so nguyen to p;p>5 khi chia cho 6 chi co the du 1 hoac 5
2)chung minh rang neu p va p+2 la so nguyen to lon hon 3 thi p+1 la mot hop so
cac an giai giup minh minh dang can gap
ai giai nhanh minh tick cho
cho 2 p/s a/b vs c/d (a,b,c,d la cac so nguyen duong ) chung minh rang neu a/b < c/d thi b/a > d/c