JEE MAIN - Mathematics Bengali (2022 - 27th July Morning Shift - No. 20)

ধরি $$f(x) = 2{x^2} - x - 1$$ এবং $$S = \{ n \in Z:|f(n)| \le 800\} $$ । তবে, $$\sum\limits_{n \in S}^{} {f(n)} $$ এর মান হল _____________.
Answer
10620

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