$$\text { Find the interval on which the curve } F ( x ) = \int _ { 0 } ^ { x } \frac { d t } { 11 + 11 t } \text { is concave downward. }$$

question 26

Short Answer

$$\text { Find the interval on which the curve } F ( x ) = \int _ { 0 } ^ { x } \frac { d t } { 11 + 11 t } \text { is concave downward. }$$

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