1/n
(n-1)/n
1/(n-1)
2/n
If x = (√5 + 1)/(√5 - 1) and y = (√5 - 1)/(√5 + 1), find x² + y²
If a + 1/a = √3, find a⁶ + 1/a⁶
Simplify: √(5 + 2√6) + √(8 - 2√15)
If x = 3^(1/3) + 3^(-1/3), find the value of 3x³ - 9x