# Is #f(x)=(x+3)(x-3)(3x-1)# increasing or decreasing at #x=2#?

##### 2 Answers

Like all functions it is constant at a value in its domain. Its derivative is continuous and positive at

#### Explanation:

# = 9x^2-2x-27#

Therefore,

The function is growing.

#### Explanation:

And now, using logs, to round out the set

Take the log of both sides

Use log properties

Differentiate both sides

Multiply both sides by

Put in,

The function is growing.