Find the indicated terms in each of the sequences in Exercises 7 to 10 whose n th terms are: an = (-1)n-1 n3 ; a9
Substituting n = 9, we obtain
a9 = (-1)9-1 (9)3
= 729
Figures 9.20(a) and (b) refer to the steady flow of a (non-viscous) liquid. Which of the two figures is incorrect ? Why ?