Question

medal

Answer 1

@phi

Answer 2

i got 1

Answer 3

I think you should think about the left and right derivative as x->3 of that absolute value part

Answer 4

okk

Answer 5

JK ITS 0 THANKS

Answer 6

|x|=x if x>0
|x|=-x if x<0
|x|=0 if x=0
therefore there is a sharp derivative at x=0 of the function f(x)=|x|
so actually the derivative of |x| is
1 if x>0
-1 if x<0
dne if x=0

Answer 7

So think about |3x-9|

Answer 8

at x=3

Answer 9

Think about graph if you have too

Answer 10

Is there a sharp turn?

Answer 11

When you write it as a piece function
do the slopes match up on both sides at x=3

Answer 12

an absolute value function makes a sharp "V"
at the vertex, the sudden change in direction makes the slope at that point undefined.
in other words, you should not expect a value for the derivative of your function at x=3