**EXPERT ANSWER**

# Determine whether the given function is a solution of the initial value problem, (10) y = r cos z; y’ = cos x – ytanr, y() = (11) y = 35; Y’ = -y(y+1) +1), y(1) = 2 (12) y = 4e+ + €20, y” – 3y + 2y = 0, y(0) = 4, y'(O) = 6 22 – xy + y +1 (13) y = 3×2 + x – 1; y’ = y(1) = 5, y'(1) = Challenge Problem (14) Suppose that a function f is a solution of the initial value problem y = r2 + y2, y(1) = 2. Find f'(1), f”(1), and f”(1). .22

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