# Second Derivatives and Beyond

### Example 1

Determine if the statement is equivalent to (mean the same thing as) the statement

"*f* is concave down."

Explain your answer (whether the statement is equivalent or not).

*f* is decreasing.

### Example 2

Determine if the statement is equivalent to (mean the same thing as) the statement

"*f* is concave down."

Explain your answer (whether the statement is equivalent or not).

*f* is negative.

### Example 3

Determine if the statement is equivalent to (mean the same thing as) the statement

"*f* is concave down."

Explain your answer (whether the statement is equivalent or not).

*f *' is decreasing.

### Example 4

Determine if the statement is equivalent to (mean the same thing as) the statement

"*f* is concave down."

Explain your answer (whether the statement is equivalent or not).

*f *' is negative.

### Example 5

Determine if the statement is equivalent to (mean the same thing as) the statement

"*f* is concave down."

Explain your answer (whether the statement is equivalent or not).

*f *" is decreasing.

### Example 6

Determine if the statement is equivalent to (mean the same thing as) the statement

"*f* is concave down."

Explain your answer (whether the statement is equivalent or not).

*f *" is negative.