Simplify: fracx2n−1xn−1\\frac{x^{2n}-1}{x^n-1}fracx2n−1xn−1 for xn≠1x^n \neq 1xn=1.
xn+1x^n + 1xn+1
xn+1x^{n+1}xn+1
x2n−1x^{2n-1}x2n−1
xn−1x^n - 1xn−1