If a > 0, b> 0, show that f(x)= a(1-e^-bx) is everywhere increasing and everywhere concave down.

If a > 0, b>0, show that f(x)= a(1-e^-bx)

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's