JEE Main 27 July 2022, Shift 1, Maths Q27

Question 27 of 90 in this shift, Maths question 27 of 30, Section B.

Let

f(x) = 2x^2 - x - 1

and

S = \{n \in \mathbb{Z} : |f(n)| \le 800\}

. Then, the value of

\sum_{n \in S} f(n)

is equal to ________.

Official answer

10620

NTA final key.

Chapter: Sequences and Series
Topic: No close match in our taxonomy
Idea tested: No close match in our taxonomy

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.