### Area L

By sketching a graph of a continuous increasing function, can you prove a useful result about integrals?

### Integral Equation

Solve this integral equation.

### Integral Sandwich

Generalise this inequality involving integrals.

# Integral Inequality

##### Age 16 to 18 Challenge Level:
Here the first part is a special case of the result in the second part. However it is easier to prove the general case directly.