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7th term of an A.P. is 40. then the sum ...

7th term of an A.P. is 40. then the sum of the first 13 terms is

A

520

B

53

C

2080

D

1040

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The correct Answer is:
A
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The sum of the first 8 terms of an A.P. is 100 and the sum of its first 19 terms is 551. Find the first term and the common difference of the AP.

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If the sum of first 10 terms of an A.P. is 4 times the sum of its first 5 terms, then find the ratio of first term and common difference.

If the sum of first p terms of an A.P is equal to the sum of the first q terms , then find the first (p+q) terms .

The sum of the 4th and 8th terms of an AP is 24 and the sum of the 6th and 10th terms is 44. Find the first three terms of the AP.

The sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112. If its first term is 11, then find the number of terms.

The sum of the first three terms of an A.P is 33 . If the product of the first terms and third term exceeds the 2nd term by 29 then find the A.P . The pth qth and rth term of an A.P . Are a b and c respectively . Prove that a (q-r)+ b(r-P)+c(p-q)=0

IF the sum of three consecutive terms of an A.P. is 21, then first the first term.

If the sum of the first n terms of an A.P. is 4n-n^(2) what is the first term? What is the sum of the first two terms? What is the second term? Find the 3rd, 10th, and the nth terms.

If the sum of first n terms of an A.P. is cn^(2) , then the sum of squares of these n terms is :

KCET PREVIOUS YEAR PAPERS-KARNATAKA CET 2003-MATHEMATICS
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