im lost

[scarlet pendant]

how is this wrong

[whole hazel]

that's a good question

[whole bay]

You forgot 6 of course

[scarlet pendant]

yeah forgot to take this down

realized a bit ago oops

took me a min to get it haha

[whole bay]

f(x) increases to the left of 6 and decreases to the right of 6. And it's continuous.

[whole hazel]

ohh

that makes sense

but wouldn't f be undefined at x=6?

or wait no

yea right

[whole bay]

no, it's a derivative that is undefined at 6. The function itself is pretty ok as they say it is continuous.

[whole hazel]

yes

just because it is continous doesn't mean it is differentiable

[whole bay]

Yeah, it is not differentiable at 6 only.

just like |x|

[magic turtle]

hey could you answer the question I left in my post please

[whole bay]

which one?

[magic turtle]

limit one

[whole bay]

I guess I answerd it. Just use 1-cos(x)

as 2 squares of sin(x/2)