What are the values of $a$ and $b$ in this limit?

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In summary, the concept of "Limit find a and b" involves finding the limit of a function as it approaches a certain value, denoted as "a", while "b" represents the value the function approaches. It is important to find the limit of a function in order to understand its behavior and make predictions. The process of finding the limit involves evaluating the function at values close to "a". Common techniques for finding limits include direct substitution, factoring, and using L'Hopital's rule. It is possible for a function to have a limit that does not exist, typically when the function approaches different values from the left and right sides or has a vertical asymptote.
  • #1
karush
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$$\lim_{{x}\to{0 }}\frac{\sqrt{ax+b}-2 }{x}=1$$
Find $a$ and $b$

Clueless!
 
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For the limit to exist, that expression must be of the form 0/0, so b = 4. Now use L'Hopital's rule to finish up.
 
  • #3
so at dx $0/0$ the denominator goes to $1$ then

dx of $\sqrt{ax+4}-2$ is $\frac{a}{2\sqrt{ax+4}}$

$x\to0$ $\frac{a}{2\sqrt{4}}=1$ $a=4$

actually can't $a$ be anything
 
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  • #4
Are there any other solutions to the equation \(\displaystyle \frac{a}{2\sqrt4}=1\)?
 
  • #5
no quess not.
 

FAQ: What are the values of $a$ and $b$ in this limit?

What is the concept of "Limit find a and b"?

The concept of "Limit find a and b" refers to the process of finding the limit of a function as it approaches a certain value, typically denoted as "a". The "b" represents the value that the function approaches as it gets closer and closer to "a".

Why is it important to find the limit of a function?

Finding the limit of a function is important because it helps us understand the behavior of the function as it approaches a certain value. This information can be used to make predictions and solve problems in calculus and other areas of mathematics and science.

How do you find the limit of a function?

The process of finding the limit of a function involves evaluating the function at values that are very close to the desired value of "a". This can be done by plugging in values into the function or by using algebraic techniques such as factoring and simplifying.

What are some common techniques for finding limits?

Some common techniques for finding limits include direct substitution, factoring and simplifying, using trigonometric identities, and using L'Hopital's rule. The technique used will depend on the type of function and the desired outcome.

Is it possible for a function to have a limit that does not exist?

Yes, it is possible for a function to have a limit that does not exist. This can occur when the function approaches different values from the left and right sides, or when the function has a vertical asymptote at the desired value of "a". In these cases, the limit is said to be undefined.

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