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NDA2023MathematicsApplication of DerivativesActual

Paragraph: Let x= ^2 A+ A+1 A where 0 A 2 Question: At what value of A does x attain the minimum value?

Options

  1. A6
  2. B4
  3. C3
  4. D2

Correct answer

D. 2

Step-by-step solution

For minimum value, A+ 1 A =2 ^2 A-2 A+1=0( A-1)^2=0 A=1 A= 2

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