12
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By letting

we get derivatives


a) Substitute these into the differential equation. After a lot of simplification, the equation reduces to

Examine the lowest degree term
, which gives rise to the indicial equation,

with roots at r = 0 and r = 4/5.
b) The recurrence for the coefficients
is

so that with r = 4/5, the coefficients are governed by

c) Starting with
, we find


so that the first three terms of the solution are

Look up the equation for it
12 if not just look it up on quiz lit and you’ll get it it’s on safari or use scan and solve
Answer:
6
Step-by-step explanation: