Let be a function defined by . Then is equal to ______.
← JEE Main 2022 · 27 Jun · Shift 1
MathematicsInteger+4 / -1Question 21 of 90
JEE Main 2022 · 27 Jun · Shift 1, Mathematics question 21
Answer and worked solution
Official answer: 99
Pairing. .
Sum. 49 pairs give 98, and : total 99.
Answer: 99