SOLUTION: SOLVE FOR f: 1/p+ 1/q= 1/f I KNOW THE ANSWER IS f=pq/p+q BUT HOW DO I GET f BY ITSELF? PLEASE HELP!!! TAHNKS lj23kfuller@yahoo.com

Algebra ->  Equations -> SOLUTION: SOLVE FOR f: 1/p+ 1/q= 1/f I KNOW THE ANSWER IS f=pq/p+q BUT HOW DO I GET f BY ITSELF? PLEASE HELP!!! TAHNKS lj23kfuller@yahoo.com      Log On


   

Question 138048: SOLVE FOR f: 1/p+ 1/q= 1/f
I KNOW THE ANSWER IS f=pq/p+q
BUT HOW DO I GET f BY ITSELF? PLEASE HELP!!!
TAHNKS lj23kfuller@yahoo.com
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
SOLVE FOR f: 1/p+ 1/q = 1/f
:
Put the two fractions on the left over a single denominator
%28%28q+%2B+p%29%29%2F%28pq%29 = 1%2Ff
:
Cross multiply and you have:
f(q+p) = pq
:
Divide both sides (q+p)
f = %28pq%29%2F%28%28p%2Bq%29%29