Question

Solve ( d power4 -1)y=0

Answer 1

Answer:

d⁴-1=0

.,...................

Answer 2

Answer:

since Auxiliary equation is

(m^4 - 1)=0,

(m^2 + 1)(m^2 - 1) =0,

so, m = -1,1,i,-i

so general solution is given equation is

y(x) = C_1 exp(-x) + C_2 exp(x) + C_3 Cosx + C_4 Sinx