1. 
Which of the following statements is true? > A differentiable function need not be defined everywhere.

2. 
Find the second derivative of the function f(x) = sin x. > f"(x) = cos x

3. 
Find the second derivative of the function f (x) = xln x. > ln x + 1

4. 
Let f (x) be a polynomial of degree 20. Which of the following functions has degree 10? > f^{10}(x)

5. 
Let f(x) = cos x. Then f^{(99)}(x) = > sin x

6. 
Which of the following functions is decreasing and concave up? >

7. 
Which of the following functions has both f' and f" positive? >

8. 
Which of the following functions has a positive first derivative and a negative second derivative? >

9. 
Assume that f and f' are differentiable. If f' is increasing, then which of the following must be true? > f is increasing.

10. 
Which of the following functions has no concavity? >
