Range of the function f(x)= x^ 2 +x+2 x^ 2 +x+1 ; x R is

Mathematics · JEE Advanced · NTA Exams — Sets, Relations and Functions

1. (1, ∞)
2. (1, 11/7]
3. (1, 7/3]
4. (1, 11/8]

Answer

(D) (1, 11/8]

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