Ava45018 Ava45018
  • 06-01-2020
  • Mathematics
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Why isn't D the answer? Isn't it also positive and concave up?

Why isnt D the answer Isnt it also positive and concave up class=

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MathPhys
MathPhys MathPhys
  • 06-01-2020

Step-by-step explanation:

At d, f'(x) is increasing (concave up), but it is not positive.  The tangent line at that point has a negative slope.

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