Like what you saw?
Create FREE Account and:
- Watch all FREE content in 21 subjects(388 videos for 23 hours)
- FREE advice on how to get better grades at school from an expert
- FREE study tips and eBooks on various topics
Power Functions - Concept
PhD. in Mathematics
Norm was 4th at the 2004 USA Weightlifting Nationals! He still trains and competes occasionally, despite his busy schedule.
A power function is a function where y = x ^n where n is any real constant number. Many of our parent functions such as linear functions and quadratic functions are in fact power functions. Other power functions include y = x^3, y = 1/x and y = square root of x. Power functions are some of the most important functions in Algebra. All power functions pass through the point (1,1) on the coordinate plane.
I want to introduce the idea of a power function. A power function is one of the form Y=X^N where N is any real number constant. A lot of our parent functions are actually power functions, for example, Y=X. One of our simplest functions is a power function where N is 1.
So here N=1. Y=X2, obviously a power function. N=2. Y=X3 . N=3, also a power function. Y=1/X is a power function. Here 1/X is the same as X-1 . So this is a power function with N=-1. And finally, Y= the square root of X. The square root of X is the same as X1/2 . So this is a power function with N=1/2.
Power functions are really important. And a lot of the basic functions we study are power functions. And so it's important to know the definition. One of the things that they all have in common is that they all pass through the point (1, 1). Anyway, power functions, functions of the form Y= X^N
Please enter your name.
Are you sure you want to delete this comment?
- Integer Power Functions 15,935 views
- Polynomial Functions 32,106 views
- Graphing Polynomial Functions 26,596 views
- Graphing Polynomial Functions with Repeated Factors 16,251 views
- Find an Equation of the Polynomial Function 28,972 views
- Finding Maximum and Minimum Values 17,694 views
- Finding Zeros of a Polynomial Function 39,885 views
- Using the Conjugate Zeros Theorem 14,252 views
- The Reciprocal Transformation 15,289 views
- Introduction to Rational Functions 24,873 views
- Limits of Rational Functions 15,270 views
- Limits at a Glance 11,530 views
- Graphing Rational Functions, n less than m 12,657 views
- Graphing Rational Functions, n=m 10,448 views
- Graphing Rational Functions, n>m 13,370 views
- Graphs with Holes 13,286 views