If

f(x)  =  x+{x} +x sin {x}  for x !=0   and    0 for x=0 

find the continuity and differentiablity

Here {x} denotes the fractional part of x

If f(x)=  when x != 0 and 0 when x=0 , then f(x) is

a)continuous at x=0

b)continuous and differentiable at x=0

c)neither differentiable nor continuous at x=0

HAAIIII friends!!!

Here is an excerpt from Robert Frost's "A roadside Stand"

     Sometimes I feel myself I can hardly bear

     The thought of so much childish longing in vain,

     The sadness that lurks near the open window there,

     That waits all day in almost open prayer

     For the squeal of brakes ,the sound of a stopping car,

     Of all thousand selfish cars that pass,

     Just one to enquire what a farmer's prices are.

     And one did stop,but only to....

     .....and turn around.

someone with a nice sense of poetry ,please explain the meaning  of the underlined lines.