Lim x2 6x 9 x 3 July 8, 2019 16 32 64 128 Lim x 3 x2 6x 9 2 2 cos 2x 6 Lim 1 cos x 3 )/ x2 6x 9 Lim x → − 3 x2 6x 9 x4 − 81 Lim 2 0