Question

Is this piecewise function differentiable at x=1?
f(x) = 3x^2 + 5 x is less than or equal to 1
= 8x x is greater than 1

Answer 1

nope

Answer 2

the equation mus be countinuos,and mus have the same derivate comming for two sides\[6*x \neq 8\]
for x=1

Answer 3

must*

Answer 4

I thought so. Thanks