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Unformatted text preview: Answer : 2 (3 points ). ind the interval(s) in which the graph of y = x 4 + 4 x 3-18 x 2 is concave up. Answer : (over) Typeset using A M S-T E X. MATH 151 Assignment 6, p . 2 Autumn 2009 3. F is a function that is deFned and continuous at all real numbers. The derivative of F is given by F ( x ) = ( x-1) 2 ( x + 3) 5 ( x + 1) 3 (i) (2 points ) What are the critical points of F ? Answer : (ii) (3 points ) Where is the function F increasing? Answer : (iii) (3 points ) or each critical point of F , decide if it is a local maximum, local minimum or neither. Answer : end...
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