Solve the problem.Find the points where the graph of the function have horizontal tangent lines.f(x) = x3 - 21x
A. (-
, 14
), (
, -14
)
B. (-7, -196), (
, 196)
C. (
, -42
)
D. (-
, 42
), (0,0), (
, -42
)
Answer: A
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The figure shows the graph of a function. At the given value of x, does the function appear to be differentiable, continuous but not differentiable, or neither continuous nor differentiable?x = -1
A. Differentiable B. Continuous but not differentiable C. Neither continuous nor differentiable
Use the following graph to answer the question.
What is the maximum normal February temperature in Midwestville?
A. -2°F B. 21°F C. 35°F D. -7°F
Find all specified roots.Square roots of 4 + 4
i
A. 
- 
i, - 
+ 
i
B. 
+ 
i, - 
- 
i
C. - 
- 
i, 
- 
i
D. 
+ 
i, - 
- 
i
Solve the equation.Let f(x) = 
- 7. Find all x for which f(x) = 9.3.
A. ? B. {-16.3, 16.3} C. {-16.3, 2.3} D. {-2.3, 2.3}