Các câu hỏi tương tự
CMR n^3 - 2n^2 + 7n - 7 chia het cho n^2 + 3 voi moi n thuoc Z
CMR;\(n^3-2n^2+7n-7⋮n^3+3\) n thuoc \(Z\)
CMR;\(n^3-2n^2+7n-7⋮n^3+3\) n thuoc \(Z\)
tim n thuoc Z n^3 - 2n^2 +7n-7 chia het cho n^2 +3
bai 1 cmr
a)n^3+11n chia het cho 6 voi moi n thuoc Z
b)mn(m^2-n^2)chia het cho 3 voi moi m,n thuoc Z
bai 2 tim x,y thuoc Z
a)(x-1)(3-y)=(-7)
help me
Tìm n thuộc Z sao cho: \(n^3-2n^2+7n-7⋮n^2+3\)
Cho P =2 / 1.3+ 2/3.5 +...+ 2/ (2n+1).(2n+3). CMR P<1, n thuoc N*
tim n sao cho n^3 +2n^2 +7n -7 chia het cho n^2 +3
Jup 2 bai nay 3 tich ( 24 diem hoi dap roi ) ( Lam dc 1 cau 2 tik )
1. CMR
A= 111...1111 - 222....2222 La so chinh phuong
(2n chu so 1) (n chu so 2)
2. CMR
\(4.n^3+14.n^2+6n+12⋮2n+1\)
Voi moi n thuoc Z *