Use implicit differentiation to find dy/dx and d2y/dx2.x2 + y2 = 5, at the point (2, 1)
A. 
= - 2; 
= -5
B. 
= - 2; 
= 1
C. 
= 2; 
= 5
D. 
= - 
; 
= 0
Answer: A
Mathematics
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quadratic: 
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Use l'H
pital's rule to find the limit.
A. 
B. 1
C. 0
D. 
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