Determine where the function is concave downward. 
Definitions:
Simplify Expression
To alter an expression into its simplest form, making it easier to understand or solve by combining like terms and applying mathematical operations.
Radix
The base of a number system; for example, the radix for the decimal system is 10.
Square Root
An amount which yields the initial number when squared.
Square Inches
A unit of area measurement for two-dimensional space, equivalent to the area of a square with sides of one inch.
Q12: Find the first and second derivatives of
Q41: Find the inflection points, if any, of
Q42: Sketch the graphs of the functions on
Q110: Find an equation of the tangent line
Q128: Find <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB7866/.jpg" alt="Find .
Q151: The strain (percent of compression) on the
Q185: Under a set of controlled laboratory conditions,
Q270: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB7866/.jpg" alt="Let .
Q270: Find the first and second derivatives of
Q311: Find the derivative of the function. <img