Graphing Root Functions and Solving Radical Equations
This page focuses on graphing root functions and solving radical equations, providing students with practical skills for working with radical vs rational math.
Graphing root functions:
- fx = √x: Domain [0, ∞), Range [0, ∞)
- fx = ∛x: Domain −∞,∞, Range −∞,∞
- fx = ⁿ√x: Domain and range depend on whether n is odd or even
Example: For fx = -√x, the domain is 0,∞)andtherangeis(−∞,0.
The guide provides transformation rules for graphing more complex root functions:
fx = a√x−h + k
Where 'a' affects vertical stretch or compression, 'h' represents horizontal shift, and 'k' represents vertical shift.
Highlight: When graphing, always find the vertex minimumormaximum and apply transformations in the correct order.
Solving radical equations:
- Isolate the radical
- Raise both sides of the equation to the power of the root
Vocabulary: An extraneous solution is a solution that satisfies the equation algebraically but not in the original context of the problem.
The page also covers systems of equations involving radicals, emphasizing the importance of checking for extraneous solutions both algebraically and graphically.