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 indeterminate form mentioned in the video?

• 0 over 0

• 1 over infinity

• Infinity over infinity

• 1 over 0

Tags

CCSS.HSF.BF.B.5

What mathematical technique is used to simplify the limit problem?

• Factoring

• Long division

• Rationalizing

• Completing the square

Why do we use rationalization in evaluating limits?

• To make the limit solvable

• To simplify the denominator

• To convert indeterminate forms to determinate forms

• To eliminate square roots

What happens to the square roots when multiplied by their conjugate?

• They become the value under the square root

• They become the sum under the square root

• They double in value

• They cancel each other out

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

• 1 over 2

• Undefined

• 0

• Infinity

In the second example, what is added to the numerator for rationalization?

• Minus the square root of 1 minus x

• Plus the square root of 1 minus x

• x plus 1

• 1 minus x

What is the result of multiplying a square root by itself?

• The value under the square root

• The square root doubles

• Zero

• One

What cancels out in the numerator of the second example?

• The 1 terms

• The square root terms

• The x terms

• Nothing cancels out

Tags

CCSS.HSA.APR.D.6

What is the final form of the expression before finding the limit in the second example?

• 1 over x plus the square root of 1 minus x

• x over the square root of 1 minus x

• x over 1 plus the square root of 1 minus x

• 1 over 1 plus the square root of 1 minus x

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

• 1

• Undefined

• 0

• 1 over 2