A) $\left( 21 x - 7 y ^ { 2 } \right) \frac { d x } { d t } = \left( 21 x y - 16 y ^ { 2 } \right) \frac { d y } { d t }$

question 33

Multiple Choice

$\text { Differentiate } 7 x ^ { 2 } - 7 x y ^ { 2 } + 8 y ^ { 3 } = 16 \text { with respect to } t ( x \text { and } y \text { are functions of } t \text { ) . }$

• A) \(\left( 21 x - 7 y ^ { 2 } \right) \frac { d x } { d t } = \left( 21 x y - 16 y ^ { 2 } \right) \frac { d y } { d t }\)
• B) \(\left( 14 x + 7 y ^ { 2 } \right) \frac { d x } { d t } = \left( 21 x y - 16 y ^ { 2 } \right) \frac { d y } { d t }\)
• C) \(\left( 21 x + 7 y ^ { 2 } \right) \frac { d x } { d t } = \left( 14 x y - 16 y ^ { 2 } \right) \frac { d y } { d t }\)
• D) \(\left( 14 x - 7 y ^ { 2 } \right) \frac { d x } { d t } = \left( 14 x y - 24 y ^ { 2 } \right) \frac { d y } { d t }\)
• E) \(\left( 14 x + 7 y ^ { 2 } \right) \frac { d x } { d t } = \left( 21 x y - 24 y ^ { 2 } \right) \frac { d y } { d t }\)

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