Answer: 64
Explanation:
You can find the value of f(5) by recursively applying the given function f(n) = -2f(n-1).
We're given that f(1) = 4. Let's calculate f(2), f(3), f(4), and finally f(5) step by step:
f(2) = -2f(1) = -2 * 4 = -8
f(3) = -2f(2) = -2 * (-8) = 16
f(4) = -2f(3) = -2 * 16 = -32
f(5) = -2f(4) = -2 * (-32) = 64
So, the value of f(5) is 64.