tim so tu nhien n de phan so 7n-8/2n-3 co gia tri lon nhat
Giup mk vs mai mk can rui
tim \(n\in N\)de\(\frac{7n-8}{2n-3}\)co gia tri lon nhat
tim cac so nguyen n de phan so sau co gia tri nguyen
2n+3 / 7
tim so nguyen n de phan so sau co gia tri la so nguyen
A=\(\frac{6n+5}{2n-1}\)
Bai 5
a)Tim gia tri lon nhat cua A=2016 phan (x-2)2 +(x-y)4+3
b)Tim cac gia tri cua x sao cho A=7-x phan x+2 co gia tri duong
tim gia tri nghuyen x de bieu thuc A= 2/6-x co gia tri lon nhat
bai 1 tim cac stn x y z sao cho x+y+z=xyz
bai 2cmr neu m^2+mn+n^2chia het cho 9 voi m ,n la cac stn thi m,n chia het cho 3
bai 3 tim stn n nho nhat de cac phan so sau toi gian
7/n+9.8/n+10,...,31/n+33
bai 4chung to rang phan so m^3+2m/m^4+3m^2 +1 toi gian
bai 5 a,cmr khong ton tai so chinh phuong nao co dang abab
b,cho 51 so nguyen duong khong vuot qua 100 cmr ton tai 2 so trong 51 so noi tren ma 1 so chia het cho so con lai
c,tim cac so co 3 chu so sao cho hieu cua so ay va gom 3 chu so ay viet theo thu tu nguoc lai la mot so chinh phuong
bai 6cmr A=2x(x+y-1)+y^2+1 luon nhan gia tri khong am voi moi x,y
bai 7 tim hai so nguyen duong sao cho tong ,hieu thuong (so lon chia cho so nho )cua chung cong lai duoc 38
bai 8 cho ba so a,b,c thoa man a/2009=b/2010=c/2011
tinh gia tri cua bieu thuc M=4(a-b)(b-c)-(c-a)^2
cho bieu thuc A = 2006 -x / 6-x tim gia tri nguyen cua x de A dat gia tri lon nhat. Tim gia tri lon nhat do
Tim n de phan so sau co gia tri nguyen va tinh gia tri do:
A=3n+9/n-4
