(a+b) + (b+c) +(c+a) =-4 -6 +12 =2
=>2(a+b+c ) =2 vậy a+b+c =1
a = (a+b+c) - (b+c) =1 -(-6) =7
b=(a+b+c) -(c+a) =1 -12 =-11
c=(a+b+c) -(a+b) =1 -(-4) =5
tim 3 so nguyen a,b,c thoa man :
a + b = -4 ; b + c = -6 ; c + a = 12
Cong ca tu va mau cua phan so 23/40 voi cung 1 so tu nhien n roi rut gon ta duoc 3/4. Tim so n.
Giai CAN KE den tung chi tiet thi tick. Giai van tat nhu SBT thi nhin nhe !
tim 3 so nguyen a,b,c thoa man
a+b=-4 , b+cc=-6 ,a+c=12
tim so nguyen a,b,c: a+b=-4 ; b+c=-6 ; c+a=12
moi nguoi oi giup minh nh minh can nhanh
Tim 3 so nguyen to khac nhau a,b,c thoa man: a.b.c=3(a+b+c)
Giup mih nha minh dang can gap
tim tat ca cac so nguyen to a,b,c co the bang nhau thoa man abc<ab+bc+ca chung minh rang neu b la so nguyen to >3 thi (b+1)(b-1) chia het cho 24
Tim so nguyen n, biet :
1 + 2 + 3 + ... + n = 55
Ai giai that la chi tiet thi tick luon ko can phai hoi.
Tim 1 so co 6 chu so tan cung la chu so 4.Khi chuyen chu so 4 len dau con cac chu so khac giu nguyen thi ta duoc so moi gap 4 lan so cu ?
GIAI CHI TIET CHO MINH NHE!
Tim tat ca bo ba so nguyen (a,b,c) thoa man
a^3(b-c)+b^3(c-a) + c^3(a-b)=1964^2013
