Question: If f(x)=alnx-a 3 x has a local minimum when x=4 and a does not equal 0, what is a? a.-1/4 b.1/4 c.-1/2 d.1/2 e.-1 f.1

If f(x)=alnx-a3x has a local minimum when x=4 and a does not equal 0, what is a?

a.-1/4

b.1/4

c.-1/2

d.1/2

e.-1

f.1

g.-2

h.2

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