IMathAS-libretexts

For the above rational function f( x ) =

\displaystyle \frac{{11}}{{{4}{x}^{{2}}+{1}}}

, identify the interval on which f is concave down.
< x <

[more..]

\displaystyle

Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity

Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity