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Mathematics 15 Online
OpenStudy (anonymous):

help please

OpenStudy (anonymous):

OpenStudy (perl):

solve f ' ' (x) = 0

OpenStudy (perl):

f ' (x) = sec^2 ( x) f ' ' (x) = 2 sec (x) * sec (x) * tan (x)

OpenStudy (anonymous):

x=pi?

OpenStudy (anonymous):

@gorv

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