Additional Resources

Limit Laws- L2


Objectives

  • Recognize the basic limit laws. Use the limit laws to evaluate the limit of a function.
  • Evaluate the limit of a function by factoring.
  • Use the limit laws to evaluate the limit of a polynomial or rational function.
  • Evaluate the limit of a function by factoring or by using conjugates.
  • Evaluate the limit of a function by using the squeeze theorem.

Limit Laws

In the image below, the Limit Laws describe properties of limits which are used to evaluate limits of functions.

The Limit Laws below describe properties of limits which are used to evaluate limits of functions.   Additional information about this image is found in the text below the image.

Properties of Limits

  • Sum law for limits states that the limit of the sum of two functions equals the sum of the limits of two functions.
  • Difference law for limits states that the limit of the difference of two functions equals the difference of the limits of two functions.
  • Constant multiple law for limits states that the limit of a constant multiple of a function equals the product of the constant with the limit of the function.
  • Product law for limits states that the limit of a product of functions equals the product of the limit of each function.
  • Quotient law for limits states that the limit of a quotient of functions equals the quotient of the limit of each function.
  • Power law for limits states that the limit of the nth power of a function equals the nth power of the limit of the function.
  • Root law for limits states that the limit of the nth root of a function equals the nth root of the limit of the function.

See the Desmos demonstration.