In what interval is the function f : x -> 2x - x\(^2\) increasing?

  • A x = 1
  • B x < 1
  • C x > 1
  • D 0 < x < 1
waec 2020furthermathematics

The correct answer is C. x > 1

2x - x\(^2\) > 0

0 > x\(^2\) - 2x

x\(^2\) - 2x < 0

x(x - 2) < 0 

x > 1

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