1.If the domain of the function f(x)=log7(1−log4(x2−9x+18))f(x) = \log_7(1 - \log_4(x^2 - 9x + 18))f(x)=log7(1−log4(x2−9x+18)) is (α,β)∪(γ,δ)(\alpha, \beta) \cup (\gamma, \delta)(α,β)∪(γ,δ), then α+β+γ+δ\alpha + \beta + \gamma + \deltaα+β+γ+δ is equal to:Login to continueOnly logged in users canattempt or see the solution.