Three numbers are in G.P. Their sum is 19 and the last number is 9.Find the middle term.

• a+ar+ar^2=19.
  ar^2=9.
  now substitute a=9/(r^2) in the 1st equation.
  so,
  9/(r^2)+r*9/(r^2)+r^2*9/(r^2)=19.
  now solve
  10r^2-9r-9=0
  r is positive so r=3/2
  and
  then substitute in 2nd equation to get a
• 8 years agoHelpfull: Yes(2) No(0)
• a+ar+ar^2=19.
  ar^2=9.
  two equation and two variable so on solving we get r=3/2;
  hence a=4;
  so ar(middle term)=4*(3/2)=6
  
• 10 years agoHelpfull: Yes(1) No(0)
• plz ..provide the solutiion....tmrw i have a xam...ayshu.530@gmail.com
• 10 years agoHelpfull: Yes(0) No(0)