Question

59. The roots or the differential equation d2y/dx2+4y=0 is
(A) real and equal
(B) real and distinct
(C) imaginary
(D) none of these​

Answer 1

Answer:

c

Step-by-step explanation:

$( {m}^{2} + 4)y = 0 \\ {m}^{2} + 4 = 0 \\ {m}^{2} = - 4 \\ m = \sqrt{ - 4} \\ m = 2i$