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AP EAMCET2013MathematicsIndefinite Integration

If d x x( x-2)( x-3) =I+C , then I is equal to

Options

  1. A1 x | x-3 x-2 |
  2. B| x-3 x-2 |
  3. C| x-2 x-3 |
  4. D|( x-3)( x-2)|

Correct answer

B. | x-3 x-2 |

Step-by-step solution

Let I₁= d x x( x-2)( x-3) Let t= x d t= d x x aligned I₁ & = d t (t-2)(t-3) & = [ 1 (t-3) - 1 (t-2) ] d t & = |(t-3)|- |(t-2)|+C & = | x-3 x-2 |+C I₁ & = d x x( x-2)( x-3) & = | x-3 x-2 |+C aligned But given, d x x( x-2)( x-3) =I+C On comparing, we get I= | x-3 x-1 |

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