- #1
Andrax
- 117
- 0
Can F'(x) =f(x) even if f is not continuous
I tried making a function let
f(x) =5 if x<=5
f(x)=4 if x>5
f is not continuous at 5
Then F(x) =5x x<=5
F(x) =4x+5 x>5
Clearly F is continuous at 5 but F is not differentiable at 5..
So is there a discontinuous function that has F'(x) =f(x) for every x?
I tried making a function let
f(x) =5 if x<=5
f(x)=4 if x>5
f is not continuous at 5
Then F(x) =5x x<=5
F(x) =4x+5 x>5
Clearly F is continuous at 5 but F is not differentiable at 5..
So is there a discontinuous function that has F'(x) =f(x) for every x?