Question: Verify Eq. (11.8.9). Let S2A be as defined in j-1 I JK i-1 j-1 k-1

Verify Eq. (11.8.9).
Let S2A be as defined in
Verify Eq. (11.8.9).Let S2A be as defined in

j-1 I JK i-1 j-1 k-1

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