Q. If P be the sum of odd terms and Q that of even terms in the expansion of x + a n , prove  that 
  ( i )   P 2 - Q 2 = x 2 - a 2 n ( i i )   4   P Q   =   x + a 2 n - x - a 2 n ( i i i )   2 P 2 + Q 2 = x + a 2 n + x - a 2 n

  • 1
What are you looking for?