2.4.3 AP Calculus Exam Integration limits

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Discussion Overview

The discussion revolves around the limits of integration in the context of a calculus problem, specifically focusing on the properties of definite integrals. Participants explore various mathematical relationships and properties related to integration limits.

Discussion Character

  • Mathematical reasoning

Main Points Raised

  • One participant suggests that the limit values may not be equal, indicating a choice of option (c).
  • Another participant questions whether the integrands are intended to be functions of \(x\).
  • A participant provides a hint involving the relationship between integrals with reversed limits.
  • Further, a participant states a mathematical equation that combines integrals from \(b\) to \(x\) and from \(x\) to \(b\) to equal zero.
  • Another participant asserts that a previous statement does not address the problem at hand.
  • A participant presents an equation that relates integrals from \(a\) to \(x\) and from \(b\) to \(x\) to the integral from \(a\) to \(b\).
  • One participant mentions properties of definite integrals, suggesting a focus on their characteristics.

Areas of Agreement / Disagreement

The discussion contains multiple competing views and interpretations regarding the properties of integrals and the specific problem being addressed. No consensus is reached.

Contextual Notes

Participants do not clarify certain assumptions about the integrands or the specific problem context, which may affect the interpretation of the integrals discussed.

karush
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by observation I choose (c) since the limit values may not be =
 
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Are you sure the integrands are supposed to be functions of \(x\)?
 
hint ...

$\displaystyle \int_b^x g(t) \, dt = -\int_x^b g(t) \, dt$
 
so then
$\displaystyle \int_b^x g(t) \, dt +\int_x^b g(t) \, dt=0$
 
that’s not the problem
 
$\displaystyle \int_a^x g(t) \, dt - \int_b^x g(t) \, dt = \int_a^x g(t) \, dt + \int_x^b g(t) \, dt = \int_a^b g(t) \, dt$
 
Properties of definite integrals ...

0*Ywl_mQYeUvSIjymd.png
 

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