# you don't want to see this on your calculus test (calculus 1 limit) | Summary and Q&A

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September 12, 2015
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blackpenredpen
you don't want to see this on your calculus test (calculus 1 limit)

## TL;DR

Computing the limit of a function as T approaches 0 using algebraic manipulations and the conjugate method.

## Key Insights

• ⛔ Computing limits requires algebraic manipulations and simplifications to evaluate the function's behavior as the variable approaches a specific value.
• 😑 The conjugate method is a useful technique in simplifying expressions and eliminating radicals.
• 💁 Indeterminate forms (such as 0/0) indicate that further steps are needed to calculate the limit accurately.
• ❓ Common denominators are obtained to combine fractions and make algebraic manipulations easier.
• ❎ Simplifying square roots and squares involves canceling out terms to create simpler expressions.
• 🔌 Limits can sometimes be evaluated by directly plugging in the given value, but other cases require additional algebraic steps.
• 😑 The process of computing limits involves carefully manipulating expressions to obtain a simplified and meaningful result.

## Transcript

we are going to compute the limit as T goes to 0 1 over T times the square root of 1 plus T inside minus 1 over T if we plug in 0 into all the t's we are going to end up with an indeterminate form that means we have to do more work so let's just focus on the algebra that we can do with this here we are subtracting two fractions let's get a common d... Read More

### Q: What is the purpose of finding a common denominator when subtracting fractions?

Finding a common denominator allows us to combine the fractions into a single expression and simplify the algebraic manipulations.

### Q: How does multiplying the numerator and denominator with the conjugate help in computing the limit?

Multiplying the numerator and denominator with the conjugate helps to eliminate the square root in the numerator and simplify the expression for further calculations.

### Q: Why is the limit considered an indeterminate form when plugging in 0 for all the T's?

Plugging in 0 for all the T's results in an indeterminate form (0/0), which means additional algebraic manipulations are required to find the actual limit value.

### Q: How are the square roots and squares simplified in the expression?

The square roots and squares are simplified by canceling out each other, resulting in a simplified expression without any radicals or squares.

## Summary & Key Takeaways

• The video explains the process of computing the limit of a function as T approaches 0 by manipulating algebraic expressions.

• Common denominators are obtained to combine fractions, and the limit is simplified by multiplying the numerator and denominator with the conjugate.

• The final result of the limit calculation is -1/2.