Thursday, 1 December 2011

Sequence and Series Airthmetic and Geometric Progression Part-5

22) The sum of the series :
       0.5 + 0.55 + 0.555+......... to n
       terms is :0
      (a) (5n / 9)  +  (5 / 9)   [ 1 - (0.1n )]
      (b)  (5n / 9)  +  (5 / 81)   [ 1 - (0.1n )]
      (c) (5n / 9)  +  (5 / 81)   [ 1 - (0.1n )]
      (d) (5n / 9)  +  (5 / 81)   [ 1 + (0.1n )]


23) (x + 1), 3x, (4x+ 2) are in A.P. Find 
       the value of x
      (a) 2
      (b) 3
      (c) 4
      (d) 5


24) The first and the last terms of an A.P.
       are -4 and 146. The sum of the terms
       is 7171. The number of terms is:
       (a) 101
       (b) 100
       (c) 99
       (d) None


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