Chapter 0

Question 1

(b^x)^y

Answer 1

b^(xy)

Question 2

(b^x)(b^y)

Answer 2

b^(x+y)

Question 3

(b^x)/(b^y)

Answer 3

b^(x-y)

Question 4

a [ 1+ r + (r^2) + (r^3) + … + r^(n-1) ]

Answer 4

a [ ( 1- r^n ) / (1 - r ) ]

Question 5

a + ar + a(r^2) + a(r^3) + …

Answer 5

a / ( 1- r )

Question 6

1 + 2 + 3 + …+ n

Answer 6

n(n+1)/2

Question 7

1 + 2r + 3(r^2) + 4(r^3) + …

Answer 7

1/ (1 - r )^2

Question 8

Sum from x=0 to infinity of (a^x)/(x!)

Answer 8

e^a