Saturday

August 23, 2014

August 23, 2014

Posted by **Jen** on Saturday, April 21, 2012 at 5:18pm.

(1-x)y'' + y = 0; x0 = 0

- math -
**MathMate**, Saturday, April 21, 2012 at 9:16pmI'll give it a try.

(1-x)y"+y=0 at x0=0

A. Check for singular points.

Write as y"+(1/1-x)y=0

and find Lim x->0 (1/1-x) = 1

Therefore x0=0 is not a singular point.

B. Assume y=∑an x^n for n=0 to ∞

then

(1-x)y"=∑n=0 to ∞ (n)(n-1)an x^(n-2)

=∑n=2 to ∞ (n)(n-1)an x^(n-2) -∑n=1 to ∞ (n)(n-1)an x^(n-1)

Now switch indices

=∑n=0 to ∞ (n+2)(n+1)an+2 x^(n) -∑n=0 to ∞ (n+1)(n)an+1 x^(n)

Add to y gives

y(x)

∑n=0 to ∞ (n+2)(n+1)an+2 x^(n) -∑n=0 to ∞ (n+1)(n)an+1 x^(n)+∑ n=0 to ∞ an x^n =0

This gives

an+1 = [(n)(n+1)an+1 - an]/[(n+2)(n+1)]

The coefficients an are dependent on values of a0 and a1, which are arbitrary constants depending on the given initial conditions.

Check my arithmetic.

**Related Questions**

math - A sequence is generated by the recurrence relation Ur+1 = 1/Ur -3. Given ...

I would like to understand my calc homework:/ - Consider the differential ...

Differential equation - find the solution of power series (2x^2-X^3)y''+(7x-6x^2...

calculus-differential equation - Consider the differential equation: (du/dt)=-u^...

Math - For the harmonic potential V(x,y) = x^2 + y^2 a) Find the total ...

Calculus - Which of the following is a separable, first-order differential ...

college differential equations - Find two linearly independent power series ...

Differential Equation - Find the general solution of t^2y"-3ty'+4y=0 on (0, ...

Calculus - Find a general solution to each first ¨C degree ordinary differential...

Calculus-HELP!!! - Find a general solution to the first – degree ordinary ...