1.If the set of all a∈Ra \in \mathbb{R}a∈R, for which the equation 2x2−(a−5)x+15=3a2x^2 - (a-5)x + 15 = 3a2x2−(a−5)x+15=3a has no real root, is the interval (α,β)(\alpha, \beta)(α,β), and X={x∈Z:α<x<β}X = \{x \in \mathbb{Z} : \alpha < x < \beta\}X={x∈Z:α<x<β}, then ∑x∈Xx\sum_{x \in X} x∑x∈Xx is equal to:a.210921092109b.212921292129c.211921192119d.213921392139Login to continueOnly logged in users canattempt or see the solution.
