If `(1-x+x^2)^n=a_0+a_1x+a_2x^2++a_(2n)x^(2n),\ ` find the value of `a_0+a_2+a_4++a_(2n)dot`

Explanation

To find the value of \( a_0 + a_2 + a_4 + \ldots + a_{2n} \) from the expression \( (1 - x + x^2)^n = a_0 + a_1 x + a_2 x^2 + \ldots + a_{2n} x^{2n} \), we can follow these steps:

### Step 1: Define the expression
We start with the expression:
\[ (1 - x + x^2)^n \]

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