Inflection Points, Concave Up and Concave Down For 1 - 2, f(x) = 2x3 - 21x2 + 60x, 1. find the intervals where f (x) is concave down. a) (-00, 2), (5, 00) b) (5, 00 ) c ) ( -00 , " ) d ) (5 ,00 ) 2. find the x-value(s) of any point(s) of inflection. a) 0 b) ? - c) 2,5 d) 5 For 3 - 4, f (x) = x2 1+ x2 3. find where f (x) is concave up. a) ( -co , - V3 b ) 1 3 c) (-0o , - # ) . ( #,00 ) d ) 1 V3' 4. find the points of inflection. a) ( - 43 4). ( 43. #) b) ( - #5. 1), (+5, 1)\f