Directions (Q.No.27 and 28) For first natural numbers If AP, then sum of terms of the sequence equals The sum of terms of a GP with first term and common ratio is given by for and for . The sum of infinite term of GP is the limiting value of when and where is the last term of the sequence. On the basis of above information, answer the following questions. 


The sum of terms of the series is 


a) 
b) 
c) 
d) 
None of these 
Directions (Q.No.27 and 28) For first natural numbers If AP, then sum of terms of the sequence equals The sum of terms of a GP with first term and common ratio is given by for and for . The sum of infinite term of GP is the limiting value of when and where is the last term of the sequence. On the basis of above information, answer the following questions. 


The sum of terms of the series is 


a) 
b) 
c) 
d) 
None of these 