Chapter 6.4, Problem 3MC

To determine

(a)

To prove:

$\frac{a+b}{b}=\frac{c+d}{d}$ for the given condition.

To determine

(b)

To prove:

$\frac{a}{a+b}=\frac{c}{c+d}$ for the given condition.

To determine

(c)

To prove:

$\frac{a-b}{a+b}=\frac{c-d}{c+d}$ for the given condition.

To determine

(d)

To prove:

$\frac{d}{c-d}=\frac{b}{a-b}$ for the given condition.