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OpenStudy (anonymous):
for the function y=(x^4)/4 - 2x^2 + 4 a.) find the intervals over which y is inc/dec b.) find the intervals over which y is concave up/down
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OpenStudy (anonymous):
okay, have you found the first and second derivative?
OpenStudy (anonymous):
(-2,0)&(2,infinte) inc rest dec
OpenStudy (anonymous):
yes but the way I was doing it I was getting all intervals increasing...
OpenStudy (anonymous):
after first derivative equation becomes x(x^2-4) =0
OpenStudy (anonymous):
oh, i got it now! thanks!
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