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OpenStudy (anonymous):
find concavity and intervals of increase and decrease of y=(1-x)/1+x) I'm really confused
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OpenStudy (perl):
interval of increase are x values for which y ' > 0 , interval of decrease are x values for which y ' < 0 concave up is when y ' ' > 0 , concave down is y ' ' < 0
OpenStudy (anonymous):
Welcome to OpenStudy, good job on your first question! :)
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