1)Let'()>0

for all

in an open interval

. Is it true or false that the function()

is decreasing on?

2)Let()>0

for all

in an open interval

. Is it true or false that the graph of the function()

is concave up on?

3)

Let x) be at least twice differentiable function on an open interval I and :9 E I. If for\") = i} and f"{xu) s: D, then which ofthe following is always true? 0 it x0 is an absolute minimum point off. O B. 30 is an inection point off. O ng is a local maximum point off. O D. x\". isa local minimum point off' Q E. x\" is an absolute maximum point off. Let f(x) be at least twice differentiable function on an open interval I and xo E I. If f'(xo) =0 and f"(x)