Multiple Choice
Find all points on the graph +
= 4x + 4y at which the tangent line is horizontal.
A) (2, 2 - ) and (2, 2 +
)
B) (1, 2 - ) and (2, 2 +
)
C) (2, 2 - ) and (1, 2 +
)
D) (0, 0) and (0, 4)
E) The tangent line is never horizontal.
Correct Answer:

Verified
Correct Answer:
Verified
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