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Let $z = 3 x ^ { 2 } + x y - 2 y ^ { 3 }$

Question 89

Multiple Choice

Let $z = 3 x ^ { 2 } + x y - 2 y ^ { 3 }$ . Then the differential $d ^ { z}$ is

A) $( 6 x + y ) d x - \left( x + 6 y ^ { 2 } \right) d y$
B) $( 6 x + y ) d x + \left( x + 6 y ^ { 2 } \right) d y$
C) $( 6 x - y ) d x + \left( x - 6 y ^ { 2 } \right) d y$
D) $( 6 x + y ) d x - \left( x - 6 y ^ { 2 } \right) d y$
E) $( 6 x + y ) d x + \left( x - 6 y ^ { 2 } \right) d y$

Let z=3x2+xy−2y3z = 3 x ^ { 2 } + x y - 2 y ^ { 3 }z=3x2+xy−2y3

Multiple Choice

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Let $z = 3 x ^ { 2 } + x y - 2 y ^ { 3 }$

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