Question

If Yo is one solution of the reduced form of a linear equation, then the substitution y=Yo[u] gives a linear equation in u in which u itself is missing. Thus the order is effectively reduced by one (substitute v=u') Illustrate this for the second order equation y''+P1y'-Poy=q

Answer 1

@Euler271

Answer 2

i don't know this :(

Answer 3

whatttttt

Answer 4

variation of parameter proof D:

Answer 5

wanna link to my ebook?

Answer 6

@dan815 he he x)

Answer 7

no stop tormenting me with differential equations

Answer 8

im not gonna touch it till summer

Answer 9

awwww D:

Answer 10

i never learned that method at school. i am meaning to learn it soon though

Answer 11

:(... doh where's the first step rofl

Answer 12

@tkhunny