A common question when dealing with probability density functions (p.d.f.) is to find the constant k. In the first video I show you how to handle a p.d.f. with just one function and then in the second video how to handle two or more functions in a p.d.f.
You will also be shown that if you have a geometrical shape such as a trapezium or triangle in the graph then it can often be quicker to use the area of the shape rather than work through the integral.

Working with one function in the p.d.f.

Probability Density Function (p.d.f.) Finding k (Part 1) : ExamSolutions Maths Revision - youtube Video

Working with two or more functions in the p.d.f.

Probability Density Function (p.d.f.) Finding k (Part 2) : ExamSolutions Maths Revision - youtube Video