Answer:
the answer is 3
Step-by-step explanation:
Answer:
n=32/5
Step-by-step explanation:
Answer:

Step-by-step explanation:
It is a linear homogeneous differential equation with constant coefficients:
y" + 4y = 0
Its characteristic equation:
r^2+4=0
r1=2i
r2=-2i
We use these roots in order to find the general solution:

2 or 3 I think is the answer for number 5