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The function f (x) = x2−2x is strict decreasing in the interval
  • a)
    (−∞, 1]
  • b)
    R
  • c)
    [1,∞)
  • d)
    none of these
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The function f (x) =x2−2x is strict decreasing in the intervala)...
f ‘ (x) = 2x – 2 = 2 (x - 1) < 0 if x < 1 i.e. x x∈ (−∞,1) x∈ (−∞,1). Hence f is strict decreasing in left decreasing in (−∞,1)
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The function f (x) =x2−2x is strict decreasing in the intervala)(−∞,1]b)Rc)[1,∞)d)none of theseCorrect answer is option 'A'. Can you explain this answer?
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