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10 questions from this quiz
The concavity of the function changes
Change sign
Find the second derivative f′′(x)f''(x)f′′(x)
When f′′(x)>0f''(x) > 0f′′(x)>0
When f′′(x)<0f''(x) < 0f′′(x)<0
f′′(c)=0f''(c) = 0f′′(c)=0
x=1x = 1x=1
y=x3y = x^3y=x3
x>1x > 1x>1
f′′(x)f''(x)f′′(x) changes sign at x=cx = cx=c
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