how many terms of series 5+7+9....... must be taken in order that the sum may be 480?

• 20
  using te sum of AP n/2*(2a+(n-1)d)
  here a=5 ;d=2.so solve
• 9 years agoHelpfull: Yes(1) No(0)
• a=5
  d=2
  sum=n/2(2a+(n-1)d)=480
  
  n/2(2*5+(n-1)2)=480
  n=20
  
• 9 years agoHelpfull: Yes(0) No(0)