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NDA2010MathematicsDifferentiationActual

If x + y =2 , then what is d y d x at y=1 equal to?

Options

  1. A5
  2. B2
  3. C4
  4. D-1

Correct answer

D. -1

Step-by-step solution

aligned & x + y =2 & 1 2 x + 1 2 y d y d x =0 aligned d y d x =- 1 x y 1 [ array l at y=1 x +1=2 x =1 array . aligned & ( d y d x )_ y=1 =- 1 1 1 & =-1 aligned

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