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Find all the second partial derivatives. X Z= Xty z 2y a z 2x azz azz x- y O A. = - ax ( x

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Find all the second partial derivatives. X Z= Xty z 2y a z 2x azz azz x- y O A. = - ax ( x + y)3 (x+y) 3 ' ay ( x + y )' dyax axdy ( x+ y ) z y X azz azz x- y O B. = - E 2 (x + y) aydx axdy ax ay ( x + y) ( x + y )s 2y azz 2x Zze y - X O C. = ax ( x + y) ay (x + y ) 3 dyax axdy ( x + y ) 3 a z 2y z 2x x- y O D. = 2 ( x+ y) ay ( x + y) dyax axdy ax 3 ( x + y ) 3

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