Write a formula for the derivative, and sketch its graph. (If an answer does not exist, enter DNE.)
f(x) =
{
tan(x) + 2 x < 0
sin(x) + 2 x ? 0
x < 0 f '(x) =
x = 0 f '(x) =
x > 0 f '(x) =
Is the derivative function continuous at x = 0?
Show transcribed image text Write a formula for the derivative, and sketch its graph. (If an answer does not exist, enter DNE.) f(x) = Is the derivative function continuous at x = 0?