Help with ((equate the coefficient))

1. Apr 25, 2012

king of bee

hey >>>

my q is : how can i solve this ?

[url=http://hh7.an3m1.com/][PLAIN]http://hh7.an3m1.com/Sep/an3m1.com_e885c207f11.png[/url][/PLAIN]

2. Apr 26, 2012

tiny-tim

welcome to pf!

hi king of bee! welcome to pf!
find a3 from the third equation, then a2 from the second equation, then a1 from the first equation …

what do you get?

3. Apr 26, 2012

HallsofIvy

Not "differential equations" so I am moving this.