Differentiate from first principles

In summary, differentiation from first principles is a mathematical method that allows us to find the exact slope of a curve at any point by taking the limit as the change in the input approaches zero. This is important in various fields of science and engineering and is crucial in understanding the behavior and properties of functions. The general formula for differentiation from first principles is <i>f'(x) = lim(h->0) (f(x+h)-f(x))/h</i>, and the steps to differentiate from first principles involve substituting the function into the formula, simplifying the expression, and solving for the derivative. This method has many applications, including calculating rates of change, determining maximum and minimum values of functions, and analyzing the behavior of functions in real
  • #1
auru
10
0

Homework Statement



Differentiate (x+1)^1/2 from first principles with respect to x.

Homework Equations



f'(x) = Lim h→0 [f(x+h) - f(x)]/h

The Attempt at a Solution



f'(x) = Lim h→0 [f(x+h) - f(x)]/h
f'(x) = Lim h→0 [(x+h+1)^1/2 - (x+1)^1/2]/h

I'm unsure how to simplify from there.
 
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  • #2
Use the equality

[tex](x-a)(x+a)=x^2 - a^2[/tex]

to simplify the limit.
 
  • #3
Simplify the fraction, let h go to zero and you're done.
 
  • #4
I've done it now, thanks!
 

Related to Differentiate from first principles

What is differentiation from first principles?

Differentiation from first principles is a mathematical method used to find the derivative of a function by taking the limit as the change in the input approaches zero. It is the most basic and fundamental way to find the derivative of a function.

Why is differentiation from first principles important?

Differentiation from first principles allows us to find the exact slope of a curve at any point, which is essential in many fields of science and engineering. It also helps us understand the behavior and properties of functions, making it a crucial concept in calculus.

What is the general formula for differentiation from first principles?

The general formula for differentiation from first principles is f'(x) = lim(h->0) (f(x+h)-f(x))/h, where f'(x) represents the derivative of the function f(x) at a point x.

What are the steps to differentiate from first principles?

The steps to differentiate from first principles are as follows:

  1. Write out the general formula for differentiation from first principles.
  2. Substitute the function f(x) into the formula.
  3. Simplify the expression as much as possible.
  4. Take the limit as h approaches zero.
  5. Solve for the derivative f'(x).

What are some common applications of differentiation from first principles?

Differentiation from first principles is used in many fields, including physics, engineering, economics, and biology. It is especially useful in calculating rates of change, determining maximum and minimum values of functions, and analyzing the behavior of functions in real-world scenarios.

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