1.
Let α\alpha and β\beta be the roots of x26x2=0x^2 - 6x - 2 = 0. If an=αnβna_n = \alpha^n - \beta^n for n1n \geq 1, then the value of a102a83a9\dfrac{a_{10} - 2 a_8}{3 a_9} is: