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OpenStudy (anonymous):
The x-coordinates of the points on the graph of f(x)=x+2cos(x) in the interval [0,π] at which the tangent line is horizontal are (in increasing order) x=? and x=?
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OpenStudy (kira_yamato):
solve f'(x) = 0
OpenStudy (anonymous):
just got one answer from that
OpenStudy (kira_yamato):
I have 2...
OpenStudy (anonymous):
give me the solution then
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