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At what value of X does the function y = -3 – 2x + X2…

At what value of X does the function y = -3 – 2x + X2 attain a minimum value?
  • A.
    -1
  • B.
    14
  • C.
    4
  • D.
    1
Correct Answer: Option D
Explanation

Given that y = -3 – 2x + X2
then, (frac{dy}{dx}) = -2 + 2x
At maximum value, (frac{dy}{dx}) = O
therefore, -2 + 2x
2x = 2
x = 2/2 = 1

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