Find Length of Arc for x = 3y^(4/3) - 3/32y^(2/3)

  • Thread starter Thread starter intelli
  • Start date Start date
  • Tags Tags
    Arc Length
Click For Summary
SUMMARY

The discussion focuses on calculating the length of the arc defined by the equation x = 3y^(4/3) - 3/32y^(2/3) for y values between 0 and 216. The arc length formula used is l = integral sqrt(1 + (dy/dx)^2). A participant attempted integration but received an incorrect result, indicating a mistake in their integration process, as the derivative of their result did not match the original integrand.

PREREQUISITES
  • Understanding of calculus, specifically integration techniques.
  • Familiarity with arc length formulas in parametric equations.
  • Knowledge of differentiation to verify integration results.
  • Basic algebraic manipulation skills for handling exponents and roots.
NEXT STEPS
  • Review integration techniques for functions involving fractional exponents.
  • Study the arc length formula in detail, focusing on its application in calculus.
  • Practice verifying integration results through differentiation.
  • Explore examples of arc length calculations for different parametric equations.
USEFUL FOR

Students studying calculus, particularly those focusing on arc length calculations, and educators looking for examples of common integration pitfalls.

intelli
Messages
19
Reaction score
0

Homework Statement



find the length of the arc


x = 3y^ (4/3) - 3/32y^(2/3) and y lies between 0 and 216


Homework Equations



l = integral sqrt (1 + (dy / dx )^2)

The Attempt at a Solution




after integration i got this y + 3/16y ^(-4/3) / (-4/3)

i have to apply 0 and 216 is that correct i get a ridiculous answer
 
Physics news on Phys.org
You can easily check if your answer is correct or not by differentiating the primitive you've found with respect to y. If it is the correct one it should equal the integrand after differentiation. In your case this is not true, so you didn't integrate correctly.
 
Last edited:

Similar threads

Replies
4
Views
3K
  • · Replies 25 ·
Replies
25
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
2
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 16 ·
Replies
16
Views
3K
Replies
5
Views
1K
  • · Replies 2 ·
Replies
2
Views
2K