1.
Let S={a:log2(92a4+1)log2(32a4+1)=2}S = \{a \, : \, \log_2(9^{2a-4}+1) - \log_2(3^{2a-4}+1) = 2\}. Then the maximum value of β\beta for which the equation
x22(aSa)x+aS(a+1)22β=0x^2 - 2\left(\sum_{a \in S} a\right) x + \sum_{a \in S} (a+1)^2 \, 2^{\beta} = 0

has real roots, is