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Co bao nhieu cap so nguyen duong (m,n) thoa cac dieu kien sau: 5n+3m=2015
Co bao nhieu cap so nguyen duong m,n thoa cac dieu kien sau:5m+3n=2015
cac ban giai giup minh bai tap nay khan cap nhe:
cho cac so a,b,c la ba so nguyen khac 0, thoa man: ab/(a+b)=bc/(b+c)=ac/(a+c) ( gia thiet cac ti le thuc deu co nghia). tinh M= (ab + bc + ca)/(a^2+b^2+c^2)
xin cam on rat nhieu
Tim cac cap so nguyen thoa man dieu kien :
1/a+b/2=5/8
cho a,b,c la cac so nguyen thoa man cac dieu kien: a+b-c=15; a-b+c=21; -a+b+c=-2015. Tim cac so nguyen do.
tim cac cap so nguyen m , n thoa man : 2^m - 2^n =2048
B1. Cho f(1)=1008,f(1)+f(2)+...+f(n)=n^2.f(n) f(n)la ham so duong
tinh f(2015)
B2 Cho cac so nguyen to q,p,r,s sao cho cac so sau deu la so nguyen to p^s+s^q,q^s+s^r,r^s+s^p
tim cac so p,q,r,s
B3 co a,b,c duong a mu 3+bmu3=c^3
so sanh a^2015+b^2015 va c^2015
Tim so nguyen duong n,m biet \(5n+3m=2015\)
cho 4 so ko am a.b.c.d thoa man a+b+c+d=1.goi S la tong cac gia tri truyen doi cua hieu tung cap so co duoc tu 4 so nay..S co the dat duoc gia tri lon nhat bang bao nhieu