Question

Tìm x, biết: (x - 2,5)⁴= (x - 2,5)²

^{mình cần gấp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!}

Answer 1

x=2,5

Answer 2

\(\left(x-2,5\right)^4=\left(x=-2,5\right)^2\)

\(\Rightarrow\left(x-2,5\right)^6\)

\(\Rightarrow x-2,5=0\Rightarrow x=2,5\)

Answer 3

\(\left(x-2,5\right)^4=\left(x-2,5\right)^2\)

\(\Rightarrow\left[{}\begin{matrix}x-2,5=-1\\x-2,5=0\\x-2,5=1\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x=1,5\\x=2,5\\x=3,5\end{matrix}\right.\)

Answer 4

đúng mình tick

Answer 5

3 người sớm nhất

Answer 6

x = 2,5 hoặc 3,5 nha bn

Answer 7

Ta có: \(\left(x-\dfrac{5}{2}\right)^4=\left(x-\dfrac{5}{2}\right)^2\)

\(\Leftrightarrow\left(x-\dfrac{5}{2}\right)^2\cdot\left(x-\dfrac{7}{2}\right)\left(x-\dfrac{3}{2}\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{5}{2}\\x=\dfrac{7}{2}\\x=\dfrac{3}{2}\end{matrix}\right.\)