Asked by Calculus
Find the value of a so that the function f(x) = xe^(ax) has critical point at x = 9
I found that the derivative is axe^(ax)+e^(ax)
But I am not sure where to go from here?
I found that the derivative is axe^(ax)+e^(ax)
But I am not sure where to go from here?
Answers
Answered by
Damon
e^(ax) (ax+1) = 0 for derivative = 0
so
a = -1/x
a = -1/9
so
a = -1/x
a = -1/9
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