I need a hint for this problem -Definite Integrals-

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Homework Help Overview

The problem involves finding the second derivative of a function defined by a definite integral, specifically F(x) = ∫₀ˣ xe^{t²} dt for x in the interval [0,1]. The original poster expresses a desire for hints rather than a complete solution, noting a caution regarding the first derivative.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the application of the Leibniz integral rule and the product rule in the context of differentiation under the integral sign. There are questions about the correct approach to finding F'(x) and the implications of factoring out variables that are not functions of the integration variable.

Discussion Status

The discussion is active, with participants providing hints and suggestions for approaching the problem. There is no explicit consensus, but guidance has been offered regarding the use of the product rule and the treatment of variables in the integral.

Contextual Notes

It is noted that the original poster is working within the constraints of an Analysis course, which may limit their familiarity with certain mathematical tools like the Leibniz integral rule.

michonamona
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Homework Statement

Let F(x) = [tex]\int^{x}_{0}xe^{t^{2}}dt[/tex] for [tex]x\in[0,1][/tex]. Find F''(x) for x in (0,1). Caution: [tex]F'(x)\neq xe^{x^{2}}[/tex]

Homework Equations


The Attempt at a Solution


I just need a hint. I know what F"(x) is already (solution was given), but I'd like to find F'(x)

Thank you

M
 
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Your derivatives are with respect to x, right? Look up the Leibniz integral rule.
 
Thanks for your reply. This is from an Analysis course so we didn't cover Leibniz's integral rule. Can you offer any additional hints?
 
Ok, factor x out. It's not a function of t. Now use the product rule and the fundamental theorem of calculus.
 
Thank you very much for your prompt reply. I never thought about factoring out the x. So I guess that was standard procedure. Any variables that is not a function of t may be factored out.

I appreciate your help.

M
 

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