# 5. If the characteristic equation of the diffe...

5. If the characteristic equation of the differential equation

${d^2y\over dx^2}+2\alpha{dy\over dx}+y=0$

has two equal roots, then the values of  α are

(A) ±1

(B) 0,0

(C) ±j

(D) ±1/2

Hint:
Explanation:

Discuss the solution.