1. Write a short paragraph about the number (e). The origin of this number, the properties of natural exponential function f(x) = e^x
2. Write about the properties of definite integrals, the relation between under the graph of the function and the integration. Give examples to prove your ideas. Use the graph of each case to prove your point of view.
3. Write about the relation between differentiation and integration. Use different examples to explain your point of view.