Instructional Video

Fractional Indices

Curated and Reviewed by Lesson Planet

Fractional exponents can be just as powerful as integer exponents. A short YouTube video shows how to deal with rational exponents. It begins with an exploration of exponents that are unit fractions of the form 1/n and then looks at all fractions m/n.

3 Views 1 Download
CCSS: Adaptable
Additional Tags
Instructional Ideas
  • Use the video as part of a review
Classroom Considerations
  • Pupils should already be familiar with radicals
  • Note that the video defines a^(m/n) as the mth power of the nth root of a, but does not mention that it is also equivalent to the nth root of a^m
Pros
  • Shows each step of the work
Cons
  • Lecture-style treatment of the subject may not be helpful for all viewers
Common Core