Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\left(x-1\right)^2=\left(x-1\right)^4\)
\(\left(x-1\right)^2-\left(x-1\right)^4=0\)
\(\left(x-1\right)^2-\left(x-1\right)^2\left(x-1\right)^2=0\)
\(\left(x-1\right)^2\left[1-\left(x-1\right)^2\right]=0\)
\(\left(x-1\right)^2\left(1-x+1\right)\left(1+x-1\right)=0\)
\(\left(x-1\right)^2\left(2-x\right)x=0\)
\(\Rightarrow\left(x-1\right)^2=0\)hoac \(\Rightarrow\orbr{\begin{cases}x=0\\2-x=0\end{cases}}\)
\(\Rightarrow x-1=0\) hoac \(\Rightarrow\orbr{\begin{cases}x=0\\x=2\end{cases}}\)
\(\Rightarrow x=1\)hoac \(\orbr{\begin{cases}x=0\\x=2\end{cases}}\)
\(\left(x-5\right)^3=\left(x-5\right)^{15}\)
\(\left(x-5\right)^3-\left(x-5\right)^{15}=0\)
\(\left(x-5\right)^3-\left(x-5\right)^3\left(x-5\right)^{12}=0\)
\(\left(x-5\right)^3\left[1-\left(x-5\right)^{12}\right]=0\)
a) x+2x+...+50x =2550
x. [ 1+2+3+....+50]=2550
ta co :
so so hang cua day 1;2;3;4;...;50:
[50-1]:1+1=50
tong cua day tren la :
[50+1].50:2=1275
=> x.1275=2550
x=2550:1275
vay x=2