Understanding Limits of Composite Functions

The video tutorial explores limits involving composite functions, focusing on three examples: G(H(x)) as X approaches 3, H(G(x)) as X approaches -1, and H(F(x)) as X approaches -3. It demonstrates how to apply limit properties and analyze function behavior from both left and right approaches. The tutorial highlights cases where limits are undefined due to discontinuities or undefined function values.

What is the first step in evaluating the limit of a composite function like G(H(x))?

• Use L'Hôpital's Rule

• Evaluate the limit of the inner function H(x)

• Find the derivative of G(x)

• Directly substitute the value into G(x)

When evaluating the limit of H(x) as x approaches 3, what is the value of the limit from both sides?

• 2

• Undefined

• 0

• 3

What is the result of G(2) when evaluating the limit of G(H(x)) as x approaches 3?

• 3

• 0

• 2

• Undefined

What happens to the limit of G(x) as x approaches -1 from the left?

• It approaches 0

• It approaches negative infinity

• It remains constant

• It approaches positive infinity

Why does the limit of H(G(x)) as x approaches -1 not exist?

• Because H(x) is undefined

• Because H(x) is constant

• Because G(x) is continuous

• Because the limits from left and right are unbounded in opposite directions

What is the limit of f(x) as x approaches -3?

• 1

• Undefined

• 0

• 3

Why does the limit of H(f(x)) as x approaches -3 not exist?

• Because H(x) is constant

• Because f(x) approaches infinity

• Because H(x) is undefined at the limit value

• Because f(x) is undefined

What is the value of H(1) when evaluating the limit of H(f(x)) as x approaches -3?

• Undefined

• 0

• 2

• 1

What is the significance of a function being undefined at a certain point when evaluating limits?

• It means the limit is infinite

• It means the function is continuous

• It means the limit does not exist

• It means the limit is zero

What is the general approach to finding the limit of a composite function?

• Evaluate the outer function first

• Apply the chain rule

• Evaluate the inner function's limit first

• Use the derivative of the composite function