Multiple Choice
Find the location of all horizontal and vertical tangents for .
A) horizontal: none; vertical: (-4, 0) , (4, 0)
B) horizontal: (4, 0) ; vertical: (-4, 0) , (4, 0)
C) horizontal: (-4, 0) , (4, 0) ; vertical: none
D) horizontal: none; vertical: (4, 0)
Correct Answer:

Verified
Correct Answer:
Verified
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