For what values of does the curve have maximum and minimum points for the given function f(x) = 2 
+ c
+ 8x?
a. c = ± ?33
b. c = ± 4?3
c. - 4?3 < c < 4?3
d. c < -4?3, c > 4?3
e. c < -?33 , c > ?33
d. c < -4?3, c > 4?3
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