- #1
Shawn Garsed
- 50
- 0
Homework Statement
Prove the following: ##a / b = ac / bc##, if ##b, c \neq 0##.
Homework Equations
P1-12
The Attempt at a Solution
##a/b = a*b^{-1}##
##1 = c*c^{-1}##
##a/b*1 = (a*b^{-1})(c*c^{-1})##
##a/b = (a*c)(b^{-1}*c^{-1})##
Now, if ##b^{-1}c^{-1} = (bc)^{-1}##, then the problem is easy to solve. However, you don't prove this until problem 3.iii and I'm assuming I can only use P1-12.
Some hints about how to proceed would be very helpful.