Suzy Little was just 3 years old when Uncle Beanie opened an account. He deposited $25, compounded daily. When she was 18 and of
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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:
