Differentiation using first priciple

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SUMMARY

Differentiation using the first principle is defined as the limit of the difference quotient, specifically expressed as \( f'(x) = \lim_{h \to 0} \frac{f(x+h) - f(x)}{h} \). In the case of the function \( y = x^2 + 2 \), applying this definition leads to the derivative \( \frac{dy}{dx} = 2x \). Key steps include expanding the numerator and simplifying the expression. A foundational understanding of basic algebra and limits is essential for mastering this concept.

PREREQUISITES
  • Understanding of limits in calculus
  • Basic algebraic skills, including binomial expansion
  • Familiarity with the concept of derivatives
  • Access to calculus textbooks or educational videos
NEXT STEPS
  • Study the limit definition of derivatives in detail
  • Practice binomial expansion techniques
  • Review examples of differentiation using first principles from calculus textbooks
  • Watch educational videos on differentiation, such as the one provided in the discussion
USEFUL FOR

Students in calculus courses, educators teaching differentiation, and anyone seeking to strengthen their understanding of the first principle of differentiation.

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Can anyone explain differentiation using first principle please......this is a question that i have no understanding on how to deal with it
IF y=x^2 + 2 show that dy/dx using first principle equals to 2x
 
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$f'(x)=\displaystyle\lim_{h \to 0} \dfrac{f(x+h)-f(x)}{h}=\displaystyle\lim_{h \to 0} \dfrac{(x+h)^2+2-(x^2+2)}{h}=\ldots$
 
thanks can you please relate it to the question that i provided please, and thanks in advance
 
Mathkid12 said:
thanks can you please relate it to the question that i provided please, and thanks in advance

I interpret using first principle as equivalent to using the definition. Am I wrong?
 
well i really don't know because I PRESENTLY DONT KNOW ANYTHING ABOUT Differentiation using first principle but thanks anywhere
 
Mathkid12 said:
well i really don't know because I PRESENTLY DONT KNOW ANYTHING ABOUT Differentiation using first principle but thanks anywhere
Fernando Revilla has given you the first two steps. The next step should be clear: Expand the numerator and simplify. Then ...

If you really "DONT KNOW ANYTHING ABOUT Differentiation using first principle" then the clicking on the suggested link is a start. Going to your textbook or class notes and reviewing an example is an even better start. Note that you need to be competent in basic algebraic skills, which might be something else worth reviewing.
 
Mathkid12 said:
well i really don't know because I PRESENTLY DONT KNOW ANYTHING ABOUT Differentiation using first principle but thanks anywhere
Then my question would be why are you asking this question? Aren't you taking a Calculus class? Do you know how to take a limit? Do you know how to square a binomial?
 

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