Problem #9: Let [2 marks f(x) = 7x+ tan (2x) Find the inverval(s) on which f is concave up. (A) (-00, 0) (B) (-00, 00) (C) (- 2 , 5 ) (D) none (E) (-00, -2 ) ( F) (0, 00) (G) (-00 , - ; ), ( 2 , 00 ) ( H) ( 4,00 ) Problem #9: Select v Save [2 marks] Problem #10: Find the horizontal asymptotes of f(x) = tan (-e-ox). (A) I only (B) - T and - " (C) -" and " (D) -I and 7 (E) I only (F) -I only (G) 0 and (H) - 4 only (1) - and 0 (J) 0 only (K) 7 and Problem # 10: Select v Save Problem #11: The graph of f is given to the right. [2 marks] Let g(x) = S , final. N *Ff (x ) 1 -3 -2 2 -1 -2 Find lim 8(0 x-2 x+2 If needed, use infinity for oo, - infinity for -wo, or DNE for does not exist. (Answers MUST be exact. Decimals are NOT allowed.) Problem #11: Enter your answer symbolically, as in these examples Save