Tìm x biết:
(x-1) +(x-2)+...+(x-2014)=3021
Tim x biet x^2014 + x^2012 + x^2010 + ... + x^2 + 1=
Tim cac so nguyen x biet rang:
a,x+(x+1)+(x+2) +...+19+20=20
b,x+(x+1)+(x+2)+...+2013+2014=2014
giup minh nha giai day du minh 3 tick cho
tim x biet(x-1)+(x-2)+..+(x-2014)
tim x,y biet \(\left(x-y\right)^{2014}+|x|+|y|=2\)
tim x,y biet /x-3/^2014+/6+2y/^2015<=0
tim x,y biet |x-3|^2014+|6+2y|^2015 be hon hoac bang 0
Tim so tu nhien x biet x2014= xx2015
Ai giai nhanh minh tick cho
Tim so tu nhien x biet x2014= x2015
Ai giai nhanh minh hua se tick cho