2.53 Prove the following identities when A and B are vectors and S, R, and T are second- order tensors: (a) tr(AB) = A.B. tr(ST) = tr S.

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Q: 19. IF A = 3x9²²¹ 2 + 2xy²j - x²yek & 8 = 3x² - y2 FIND: A) 7. À @ (1,-1,₁1) *- - - - = a d + + ax •…

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