gladius999

i got: P1/T1 +P2/T2= n1f + n1fT1/T2
simplifies to 2n1f=P1T1/T1T2+P2T1/T2
n1f=(P1T1/T1T2+P2T1/T2)/2

sub into PfV=n1fRT1 assuming V, R =1
Pf=n1fT1
Pf=P1T1/2T2 + P2T1^2/2T2

sorry im horrible at this, where did i go wrong?