Troubleshooting an Equation of the Curve with y Intercept 4

Click For Summary
SUMMARY

The discussion focuses on solving the differential equation dy/dx = 88yx^(10) with a specified y-intercept of 4. The correct approach involves separating variables and integrating both sides, leading to ln(y) = 8x^(11) + C. The error identified was in the placement of the constant of integration, which should be added immediately after integration before exponentiating. The correct solution yields y = e^(8x^(11) + C), with the constant determined by substituting the y-intercept.

PREREQUISITES
  • Understanding of differential equations
  • Knowledge of integration techniques
  • Familiarity with natural logarithms
  • Ability to manipulate algebraic expressions
NEXT STEPS
  • Study the method of separation of variables in differential equations
  • Learn about the constant of integration in calculus
  • Explore the properties of exponential functions
  • Practice solving initial value problems in differential equations
USEFUL FOR

Students and professionals in mathematics, particularly those studying calculus and differential equations, as well as educators looking for examples of common mistakes in solving such equations.

beanryu
Messages
90
Reaction score
0
Find an equation of the curve that satisfies

dy/dx = 88yx^(10)
and whose y intercept is 4

dy/y = 88x^(10)dx

integral both sides

ln(y) = 8x^(11)
y = e^(8x^(11))+C

put x = 0 into the equation
I got C = 3.

Why am I wrong?
 
Physics news on Phys.org
Because you're supposed to add the constant of integration C right after you integrate, and THEN exponentiate both sides.
 
THanx dude!
 

Similar threads

  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
Replies
4
Views
3K
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
Replies
3
Views
2K
Replies
6
Views
2K
Replies
5
Views
2K
Replies
3
Views
2K