Find the Interval on Which the Graph Of $f ( x ) = \ln \left( x ^ { 2 } + 1 \right)$

question 13

Multiple Choice

Find the interval on which the graph of $f ( x ) = \ln \left( x ^ { 2 } + 1 \right)$ concave upward?

• A) \(( - 1,1 )\)
• B) \(( - 1,2 )\)
• C) \(( - 2,1 )\)
• D) \(( - 2,2 )\)
• E) \(( - 1,3 )\)
• F) \(( - 3,2 )\)
• G) \(( - 3,3 )\)
• H) \(( - \infty , \infty )\)

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