\(\frac{n-6}{n-4}\inℤ\Leftrightarrow n-6⋮n-4\)
\(\Rightarrow n-4-2⋮n-4\)
\(n-4⋮n-4\)
\(\Rightarrow2⋮n-4\)
\(\Rightarrow n-4\inƯ\left(2\right)\)
\(\Rightarrow n-4\in\left\{-1;1;-2;2;-4;4\right\}\)
\(\Rightarrow n\in\left\{3;5;2;6;0;8\right\}\)
vậy_
Tim cac so nguyen m,n,p thoa man p = m - n = m . n
Giup minh voi minh dang can gap
tim so tu nhien n de n +3 chia het cho n-1
gup minh voi dang can gap
Tim n€Z , biet:
a) n+8/n-5 la so nguyen.
b)n2+1/n-6 la so nguyen.
Giup minh voi minh dang can gap .
Lam chi tiet ho minh nha.
Q= 1/2! + 2/3! + 3/4! + ... + n-1/n!
Chung minh rang : Q<1
Minh dang can gap. Giup minh voi!!
Tim x :
x/2 + x/6 + x/12+ ................................................ + x/90 = 9
giuy minh voi minh dang can gap
Tim chu so tan cung cua A=2^0+2^2+2^4+2^6+...+2^2014+2^2016
Tim so tu nhien n biet 82 chia n du 7 va 144 chia n du 9
MINH DANG CAN GAP CAC BAN GIAI NHANH GIUM CHO MAI MINH PHAI NOP ROI
ai giup minh voi
chung to rang 2 so n+1 va 3n+1{n thuoc N} la 2 so nguyen to cung nhau
minh dang can gap...................''''
Cho truoc n diem trong do ko co 3 diem nao thang hang.Ve cac duong thang di qua cac cap diem,Tim n biet rang neu co them 1 diem(ko thang hang voi bat ki 2 diem nao trong so n diem da cho) thi so duong thang ve duoc tang them la 8.
Minh dang can gap!Cac ban giup minh voi nhe!
(a+a^2+a^3+a^4+...+a^29+a^30) chia het cho (a+1) (a thuoc N)
cac ban giup minh voi nhanh len nhe minh dang can gap
