Answers to quiz 10

1. (δ(x)+δ(−x))/2 = (δ(x)+δ(x))/2 = δ(x) (Eq. 11.19a)
    δ(2x)/2 = δ(x)/4 (Eq. 11.19c)
    x2δ''(x)/2 = δ(x) (Eq. 11.18c)
2. The equation (12.19) can be solved using Green's functions or by variation of parameters (Problem 14).

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