Q32 / 90 · KVPY 2019 (SB/SX) · Mathematics

The area of the region bounded by the lines x=1, x=2, and the curves xy-ex=sinx and 2xy=2sinx+x3 is

  • A
    e2-e-16
  • Correct answer
    B
    e2-e-76
  • C
    e2-e+16
  • D
    e2-e+76

Solution

The area of region bounded by the curves 

xy-ex=sinx or y=sinxx+ex and 2xy=2sinx+x3

or y=sinxx+x22

between lines x=1 and x=2 is

A=∫12sinxx+ex-sinxx+x22dx

=∫12ex-x22dx=ex-x3612=e2-e-76

Hence, the correct answer is option: 'B'.

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