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TS EAMCET · Maths · Indefinite Integration

tan-1xx3dx=

  1. A -x2+12xtan-1x-12x+C
  2. B -x2+12x2+1tan-1x-12x2+C
  3. C -12x-12+12x2tan-1x+C
  4. D 12x+12x2tan-1x+C
Verified Solution

Answer & Solution

Correct Answer

(C) -12x-12+12x2tan-1x+C

Step-by-step Solution

Detailed explanation

∫tan−1xx3dx =tan−1x⋅−12x2+12∫1(1+x2)x2dx =−12x2tan−1x+12∫(1x2−11+x2)dx =−12x2tan−1x+12(−1x−tan−1x) =−12x−(12+12x2)tan−1x