prove or display a desproving example:
there is f and g which are defined for which .
if 0<g(x)<1 for then
if f monotonickly decreasing in and then f(x)>0 for all
C)if f differentiable in (a,b) so then there is so
D)if f is integrabile in [a,b] then there is x in [a,b] so
i dont know from the start how to know intuetivly whether its true or false