Applying Leibniz's Rule for Differentiating an Integral

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SUMMARY

The discussion focuses on applying Leibniz's Rule for differentiating the integral \(\int_{x}^{2x^{2}+1} \sin(t^{2}) dt\). The correct differentiation yields the result \(\sin((2x^{2}+1)^{2}) - \sin(x^{2})\). Participants emphasize the importance of recognizing 't' as a dummy variable and correctly applying Leibniz's Rule, clarifying that it is distinct from the Fundamental Theorem of Calculus.

PREREQUISITES
  • Understanding of Leibniz's Rule for differentiation
  • Familiarity with the Fundamental Theorem of Calculus
  • Basic knowledge of integral calculus
  • Ability to manipulate trigonometric functions
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  • Study the application of Leibniz's Rule in various contexts
  • Explore advanced techniques in integral calculus
  • Learn about the Fundamental Theorem of Calculus in depth
  • Practice problems involving differentiation of integrals
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Students studying calculus, mathematics educators, and anyone looking to deepen their understanding of integral differentiation techniques.

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Homework Statement



[tex]\int_{x}^{2\,{x}^{2}+1}sin{t}^{2}dt[/tex]

I need to take differential of that

Homework Equations



Fundamental theorem of calculus

The Attempt at a Solution



I know 't' is a dummy var, so I replace it with x,

and then
get
sin((2x^2+1)^2)-sin(x^2)
as answer. But I am not very sure about my answer.

Can anyone please check my solution?

Thanks.
 
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Look up Leibniz's Rule. After that it's just a plug and chug:

Edit: Leibniz Rule, not Theorem
 
Last edited:

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