Các câu hỏi tương tự
tim x biet /x/+/x+1/=3x-2006
tim stn x biet 1/3 + 1/6 + 1/10 +...+2/x x (x - 1) = 2005/2006
Tim so nguyen to x va y biet x^2-x+993*y=2006
tim x,y biet
|x-2005| + |x-2006| + |y-2007| + |x-2008|=3
Tim x thuoc N biet 5/ 1.6 +5/ 6.11+....+5/ (5x+1).(5x+6)=2005/2006
1)Tim x, biet: 1-4+7-10+.............-x=-75
2)Tinh 1+2-3-4+5+6-......+2002-2003-2004+2005+2006
tim x biet |2-3x|=x-1
tim x biet /3x+1/+/4-x/=3
tim x biet:3x+7chia het cho x-1
hay cho biet cach lam va ket qua