Question

How do you know you can't take the derivative of an equation?

Answer 1

you can always take the derivative of a function. taking derivative == finding slope of a function. so unless the function has an undefined slope, you can always find the derivative.

Answer 2

Thanks :)

Answer 3

if the function is not continous

Answer 4

at that point

Answer 5

that too. DeritaveOfJuan is right.

Answer 6

If derivative exists the function is continuous on that domain..but does the vice-versa is true?

Answer 7

no, even if the function is cont, it does not mean it has a derivative, Think about the graph of y=IxI

Answer 8

its cont but differentiable at x=0

Answer 9

not*

Answer 10

Which is because a vertex is formed at x=0. Vertexes and noncontinuous are defined as undifferentiable.