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Question: Answered & Verified by Expert
022x2-3x+x-12dx, where t is the greatest integer function, is equal to
MathematicsDefinite IntegrationJEE MainJEE Main 2022 (27 Jul Shift 2)
Options:
  • A 76
  • B 1912
  • C 3112
  • D 32
Solution:
1186 Upvotes Verified Answer
The correct answer is: 1912

022x2-3x+x-12dx

=022x2-3xdx+02x-12dx

Let I1=022x2-3xdx=0323x-2x2dx+3222x2-3xdx

=3x22-2x33032+2x33-3x22322

=278-94+83-6-94+278=94-103=1912

Let I2=02x-12dx

Assume x-12=t

i.e. I2=-1232tdt

=-120-1dt+010·dt+1321·dt

=-t-120+t132=-12+32-1=0

Hence, 022x2-3x+x-12dx=1912

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