1. Mar 19, 2010 #1

   Schniz2

   

   1. The problem statement, all variables and given/known data
   
   Somehow the upper two statements are manipulated to get the lower one but i cant work out how.... (see attatched image)
   
   2. Relevant equations
   
   N/A
   
   3. The attempt at a solution
   
   Oh you dont want to see mypages of scribble. I cant get close to that expression!

    

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     Algebra1.jpg

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   Schniz2, Mar 19, 2010
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3. Mar 20, 2010 #2

   Mark44

   

   Insights Author

   Staff: Mentor

   In the first two equations you have expressions that are both equal to V_CC/3, so you can equate the two expressions on the left sides.
   
   Doing that, you can solve for R_BB as a constant multiple of R_E.
   
   Then, substitute in either of your first two equations to get the desired equation in V_BB, V_f, and V_CC.

    

   Mark44, Mar 20, 2010
4. Mar 21, 2010 #3

   Schniz2

   

   ahh, finally got it... the last time i tried to do it that way i got and extra factor somehow and that's what was messing me up.
   
   thanks!

    

   Schniz2, Mar 21, 2010

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