Sequence And Series : Mathematics

 

Q.1. The sum to n terms of the series

 

 

ANS- A

Q.2. The sum up to (2n+1) terms of the series

 

ANS- D

Q.3. If a,b,c are in H.P ., then the value of 

 

 

ANS- D

Q.4. In an arithmetic sequence  

A)1

B) -1

C)0

D) mnp

ANS- C

Q.5.   

A) A.P

B) G.P.

C) H.P.

D) none of these

Q.6. For a sequence , if  

 

ANS- B

Q.7. If a,b,c,d are in H.P., then ab+bc+cd is equal to 

A) 3 ad

B) (a+b) (c+d)

C) 3 ac

D) none of these 

Q.8. If a,b,c are in H.P., then the value of  

A) 1

B) 2

C) 3

D) 0

Q.9. If a,b,c  are in H.P., then 

 

ANS- A

Q.10. If  are the sum of n,2n,3n terms respectively of an A.P., then  

A) 1

B) 2

C) 3

D) 4