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KCET2015MathematicsArea Under Curves

If ( f(x)=2 x² ), find ( f(3.8)-f(4) 3.8-4 )

Options

  1. A( 1.56 )
  2. B( 156 )
  3. C( 15.6 )
  4. D( 0.156 )

Correct answer

C. ( 15.6 )

Step-by-step solution

Given that, ( f(x)=2 x² ) So, ( f(3.8)-f(4) 3.8-4 ) ( = 2(3.8)²-2(4)² 3.8-4 = 2(3.8-4)(3.8+4) (3.8-4) ) ( =2(3.8+4)=15.6 )

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