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The sum of first n terms of an A.P. is S...

The sum of first n terms of an A.P. is `S_n=…………` a)`n/2[t_1+t_n]` b)`n/2[2+(n-1)d]` c)`n/2[2+(n-1)d]` d)None of these

A

`n/2[t_1+t_n]`

B

`n/2[a+(n-1)d]`

C

`n/2[2+(n-1)d]`

D

none of these

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CHETANA PUBLICATION-Arithmetic Progression-EXERCISE
  1. The next two terms of the given sequence 1,3,7,15,31….. are: a)42, 54 ...

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  2. In an A.P, a=8, tn=62, Sn=210, then find n. a)5 b)6 c)7 d)8

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  3. The sum of first n terms of an A.P. is Sn=………… a)n/2[t1+tn] b)n/2[2+(n...

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  4. A meeting hall has 30 rows in all. There are 20 seats in the first row...

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  5. State whether the given sequence is an A.P or not : 1^3,2^3,3^3,4^3,5^...

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  6. Is the following sequence Arithmetic Progression? If it is an A.P then...

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  7. Is the following sequence an Arithmetic progression? If it is an A.P t...

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  8. Is following sequence an Arithmetic progression? If it is an A.P then ...

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  9. Is the following sequence an Arithmetic progression? If it is an A.P t...

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  10. Is the following sequence is an Arithmetic progression? If it is an A....

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  11. Write an A.P where the common difference d and the first term a are: a...

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  12. Write an A.P where the common difference d and the first term a are a=...

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  13. Write an A.P where the common difference d and the first term a is giv...

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  14. Write an A.P where the common difference d and the first term a is giv...

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  15. Write an A.P where the common difference d and the first term a is giv...

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  16. How many terms are there in the A.P 187,194,201,…..,439 ?

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  17. Find n, if the nth term of the following sequence is 68: 5,8,11,14,….

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  18. If the 10th term and the 18th term of an A.P are 25 and 41 respectivel...

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  19. How many three digit natural numbers are divisible by 4?

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  20. Find the 18th term of the A.P 1,7,13,19.

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