Question: (a) Prove that the matrix {} is inverse to {} by performing the matrix multiplication. (b) Derive Eq. (3.53). ( : = [(

(a) Prove that the matrix {ηαβ} is inverse to {ηαβ} by performing the matrix multiplication.
(b) Derive Eq. (3.53).
(  : = ½ [( + )2 - 2 - 2].

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