Do you know if you have the right answer?

  • Context: High School 
  • Thread starter Thread starter Helical
  • Start date Start date
Click For Summary

Discussion Overview

The discussion revolves around the ability to verify answers in calculus, particularly in relation to checking solutions for derivatives, integrals, and differential equations. Participants explore the parallels between verification methods in algebra and calculus, as well as tools that can assist in this process.

Discussion Character

  • Exploratory, Conceptual clarification

Main Points Raised

  • One participant expresses curiosity about whether answers in calculus can be checked similarly to algebraic problems, indicating a lack of experience with calculus.
  • Another participant suggests that many calculus problems can indeed be checked, particularly differential equations, although they note that it can sometimes be challenging to be certain of one's answer.
  • A participant shares their personal experience of needing to recheck answers for confidence, appreciating that some verification is possible in calculus.
  • It is mentioned that in elementary calculus, one can check derivatives using a limit approach and verify integrals by differentiating the anti-derivative obtained.
  • Additionally, the use of software like Mathematica and Maple is proposed as a means to verify answers in elementary calculus.

Areas of Agreement / Disagreement

Participants generally agree that there are methods to check answers in calculus, but there is no consensus on the ease or reliability of these methods, and some uncertainty remains about the verification process.

Contextual Notes

Limitations include the varying levels of confidence among participants regarding the verification methods and the potential complexity involved in ensuring correctness in calculus compared to algebra.

Who May Find This Useful

Individuals beginning their studies in calculus or those interested in understanding the verification of answers in mathematical contexts may find this discussion relevant.

Helical
Messages
74
Reaction score
0
Hello, I'm going to begin undergraduate study next year (majoring in physics) and I have not taken any calculus yet. What I'm wondering is, with calculus can you check that your answer is right? Like with algebraic problems you can plug a variable back into your original equation and see if it comes out equivialent. This is just something I'm curious about and probably is a stupid question which stems from my ignorance of calculus. Anyways, thanks for any responses.
 
Physics news on Phys.org
in fact, with calculus many questions can be checked. such as differential equation,you can check it like the way in algebraic equation.
but sometime, it's really hard to ensure ourself.
 
I see thanks for the response. The reason I'm curious is that I'm often not very confident so will recheck myself and like that ability with algebra. Good to know you can do it at least with some calculus.
 
In elementary calculus, if you are trying to evaluate the derivative of a function f(x) at a point x0, you can generally check your answer (with your calculator) against (f(x + epsilon) - f(x)) / (x + epsilon), for some small epsilon, like 0.0001.

When taking an integral you can simply check your answer by differentiating the anti-derivative you got.

And as already mentioned you can check your answers for differential equations by plugging in the answer you get and seeing if it indeed solves the equation.
 
There are also programs like Mathematica/Maple (and others) that'll let you verify most of your elementary calc answers.
 

Similar threads

  • · Replies 36 ·
2
Replies
36
Views
7K
  • · Replies 29 ·
Replies
29
Views
5K
  • · Replies 4 ·
Replies
4
Views
7K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 29 ·
Replies
29
Views
3K
  • · Replies 4 ·
Replies
4
Views
4K
  • · Replies 23 ·
Replies
23
Views
3K
Replies
4
Views
3K
  • · Replies 20 ·
Replies
20
Views
2K
  • · Replies 15 ·
Replies
15
Views
3K