The shear stress xz in terms of stress function is given by _________

1.	The shear stress xz in terms of stress function is given by __________
A.	( frac{ }{ z}- x )
B.	(- frac{ ^2 }{ x z}- x )
C.	( frac{ ^2 }{ x^2} - x )
D.	( frac{ }{ x}- x )
Answer» C. ( frac{ ^2 }{ x^2} - x )

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