Biểu thức nào tương dương với biểu thức sau. x ˜ ( n ) N = 2 ⋅ x 2 ( n ) N

$x\left(n\right)\{\begin{array}{c}2x{}^2\left(n\right)\\ 0\le n\le N-1\\ 0\\ n\text{c}\text{o}\text{n}\text{l}\text{a}\text{i}\end{array}$

$\tilde{x}(n){}_N=2x{}^2\left(n\right)lN\le n\le l\left(N+1\right)$

$x(n){}_N=2\cdot x{}^2\left(n\right)$

$x\left(n\right)\{\begin{array}{c}2x{}^2\left(n\right)\\ 0\le n\le N-1\\ \text{r}\text{e}\text{c}\text{t},\left(n\right)\\ n\text{c}\text{o}\text{n}\text{l}\text{a}\text{i}\end{array}$