a. The total areas of step function, f(k)=k fee 500.50 ft?, assuming each step has a width of 1 b If f is continuous and, A(x) =f foodt. a then a f

I need help with B only. Not sure about the A'(x) portion. Question is true false.

a.The total areas of step function, f(k)=k fee500.50 ft?, assuming each step has a width of 1bIf f is continuous and,A(x) =f foodt.athena f fod = f(x )aor, A'(x) = f (x).C.Implicit differentiation can be used to firon the curve x? + y? = r?, as 2xdx +2ydy=0, orexpress y = tvr? - x? and then differentiating6.x2d.lim2x3 -5- limx-9 x3 - 27 x-9 3x?=2.e.Is"f(x) dx = (area above x - axis) -f.The fact that f is an integrable function indifferentiable function, F(x), such that F'(x )= f(x)