# solutions

• December 10th 2009, 07:54 AM
hooke
solutions
How many solutions exist for this set of equation ?

ab=1 , bc=2 , ca=8

A . 1
B . 2
C. 3
D . 6
• December 10th 2009, 10:19 AM
stapel
What have you tried so far? You've done something like solve the first and third equations for "a=", expressed "c" in terms of "b", and then solved the second equation for "c=", and... then what?

Please be complete. Thank you! (Wink)
• December 10th 2009, 10:57 AM
Raoh
Quote:

Originally Posted by hooke
How many solutions exist for this set of equation ?

ab=1 , bc=2 , ca=8

A . 1
B . 2
C. 3
D . 6

Hint : $a=2$ or $a=-2$.