Exploring Limits through Rationalization

In this video, Mr. Baker explains how to evaluate limits using the technique of rationalizing. He demonstrates this with two examples, showing how to handle indeterminate forms by multiplying by the conjugate. The process involves simplifying expressions to make limits solvable, ultimately finding the limit values for each example.

What is the result of directly substituting x=0 in the given limit problem?

• Undefined

• 1

• 1/2

• 0/0

What does the term 'indeterminate form' refer to in the context of limits?

• A limit that does not exist

• A form like 0/0 that does not give a clear limit

• A limit that approaches infinity

• A limit that can be determined easily

What technique is used to simplify the limit problem?

• Factoring

• Rationalizing

• Substitution

• Expanding

Why do we multiply by the conjugate in the process of rationalizing?

• To simplify the denominator

• To make the numerator a perfect square

• To eliminate the square root

• To create a difference of squares

What happens to the square roots in the numerator after rationalizing?

• They cancel out

• Nothing

• They double

• They become one

What is the limit of the first example as x approaches 0?

• 0

• 2

• 1/2

• 1

After rationalizing and simplifying, what happens to the x terms in the denominator?

• They are squared

• They cancel out

• They remain unchanged

• They are halved

In the second example, what is the conjugate used for rationalizing?

• 1 - sqrt(1+x)

• 1 + sqrt(1-x)

• 1 + sqrt(1+x)

• 1 - sqrt(1-x)

Tags

CCSS.HSN.RN.A.2

What is the final form of the numerator in the second example after simplification?

• 1 - (1-x)

• x

• 1 - x

• 1 + x

Tags

CCSS.HSA.APR.D.7

What is the limit of the second example as x approaches 0?

• 1/2

• 1

• 0

• 2