x100 = x
=> x100 - x = 0
=> x99.x - x = 0
=> x(x99 - 1) = 0
\(\Rightarrow\orbr{\begin{cases}x=0\\x^{99}-1=0\end{cases}\Rightarrow\orbr{\begin{cases}x=0\\x^{99}=1\end{cases}\Rightarrow}\orbr{\begin{cases}x=0\\x=1;-1\end{cases}}}\)
tim x biet (x+1)+(x+2)+(x+3)+...+(x+100) =570
tim x biet : (x+1)+(x+2)+(x+3)+...+(x+100)=5550
Tim x biet (x+1)+(x+2)+(x+3)........+(x+100)=5750
tim x biet x^2=100
tim x biet (x+1)+(x+2)+(x+3)+⋯+(x+100)=5750
tim x biet : ( x + 1 ) + ( x + 2 ) + ( x + 3 ) + ( x + 4 ) + ... + ( x + 100 ) = 5750
tim x biet ;100(x-3).(x-2)=1
tim x biet : (x+1)+(x+2)+.....+(x+100)=5750
tim so tu nhien x biet 493...x va 20,x ,100
