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10 questions from this quiz
Above the xxx-axis
From positive to negative
f′(x)=0f'(x) = 0f′(x)=0
Below the xxx-axis
f′(x)f'(x)f′(x) is increasing
From negative to positive
Reaches a max/min, not crossing axis
f′(x)f'(x)f′(x) is decreasing
Transitions between inc/dec behaviour
As a smooth curve without sharp corners
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