How to use direct substitution to evaluate the limit

The video tutorial explains how to evaluate the limit of a function G of X as X approaches one. It begins with a discussion on the concept of limits and the importance of understanding the graph of the function. The teacher uses a hypothetical graph to illustrate the process. The tutorial then introduces the direct substitution method as the simplest way to evaluate limits, demonstrating the calculation step-by-step. The example used involves substituting X with 1 in the function, leading to a final result of -1.

What is the main focus of the initial discussion in the video?

• Evaluating the limit of a function as x approaches a specific value

• Graphing linear equations

• Finding the derivative of a function

• Solving differential equations

What is the method called that involves plugging in values directly to evaluate limits?

• Numerical approximation

• Graphical analysis

• Direct substitution

• Indirect substitution

When using direct substitution, what is the first step?

• Differentiate the function

• Integrate the function

• Substitute the value into the function

• Graph the function

What is the result of substituting x = 1 into the function in the example?

• -1

• 0

• 1

• 2

What is emphasized as the simplest way to evaluate limits?

• Trial and error

• Using a graphing calculator

• Direct substitution

• Complex analysis