Draw the graph of a continuous increasing function in the first
quadrant and horizontal and vertical lines through two points. The
areas in your sketch lead to a useful formula for finding
Solve this integral equation.
An inequality involving integrals of squares of functions.
Thank you for your solutions to Daniel (no
school given), to Shaun from Nottingham High School and to Andrei
from Tudor Vianu National College, Bucharest, Romania.