Các câu hỏi tương tự
tim m,n thuôc Z de 1/m + n/6 = 1/2
tim m,n thuoc N de m/2 - 2/n = 1/2
1.chung minh rang:3n.(n+1)chia het cho 6(n thuoc N
2.cmr 5n.(n+1).(n+2) chia het cho 30(n thuocN)
3.tim so tu nhien n de 7.(n-1) chia het cho 4
4.tim so tu nhien n de 5.( n-2) chia het cho 3
tim gia tri lon nhat cua A=2018-/x-7/-/y+2/
tim gia tri nho nhat cua B /x-500/+/x-300/
tim n thuoc Z,biet: a,3.n+2 chia het cho n-1; b, n^2 +5 chia het cho n+1
tim n thuộc Z sao cho (n-6)chia hết cho (n-1)
tim n thuộc Z sao cho (n-5)chia hết cho (n-2)
tim n biet
2n+2n+1=12
3n+2-3n+1=54
tim n biet
n3=n2
n10=n8
(n-1)2=(n-1)5
(n-3)4=(n-3)2
tim n tuoc N / (n-2) (n^2+n-1) la so nguyen to
1,tim n
n+6:n-3
2,tim uc (6n+4,3n)
3.tim uc (7n+4,7n)
tim n thuoc N de 2^n-1 va 2^n+1 la so nguyen to
a, Cho ( a,b) = 1 . Chung minh rang (a.b, a+b)=1
b, Cho (a,b)= 1. Tim UCLN (11a+2b , 18a +5b)
C,, Cho A = m+n ; B=m^2+n^2.Trong do m va n la cac so tu nhien nguyen to cung nhau. Tim UCLN (A,B)
d, Tim cac so tu nhien n sao cho n^3 - n^2 + n-1la so nguyen to