Home
Class 10
MATHS
If the first two terms of an A.P. Are -...

If the first two terms of an A.P. Are -3 and 4, then what is the 21st term of this A.P. ?

A

`-143`

B

143

C

137

D

17

Text Solution

Verified by Experts

The correct Answer is:
C
`[t_(n) = a+ ( n -1) d . ` Here , `d=7]`
Promotional Banner

Topper's Solved these Questions

  • ARITHMETIC PROGRESSION

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise 3.2 (1 mark each)|8 Videos

  • ARITHMETIC PROGRESSION

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise 3.3 (1 mark each)|9 Videos

  • ARITHMETIC PROGESSION

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise PRACTICE SET 3.4|29 Videos

  • BOARD'S QUESTION PAPER

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise QUESTION|30 Videos

Similar Questions

Explore conceptually related problems

The sum oif the first ten terms of an A.P. is equal to 155, and the sum of the first two terms of a G.P. is 9. Find these progressionsif the first term of the A.P. equals the common ratio of the G.P. and the 1st term of G.P. equals the common difference of A.P.

The sum of the first five terms of an A.P. and the sum of the first seven terms of the same A.P. is 167. If the sum of first 10 terms of this A.P. is 235, find the sum of its first twenty terms.

The sum of first n terms of an A.P. is 3n^2+4n . Find the 25 t h term of this A.P.

The sum of the first n terms of an A.P. is 3n^2+6n . Find the n t h term of this A.P.

The 11th term of an A.P. is 16 and the 21st term is 29 . Find the 16th term of this A.P.

If the first and the last terms of an A.P. are -4 and 146 respectively and the sum of this A.P. is 7171 then its common difference is

If the sum of first 3 terms of an A.P. is 33 and their product is 1155. Then the 11^(th) term of the A.P. Is

The sum of the first six terms of an A.P. is 42. The ratio of the 10th term to the 30th term of A.P. is 1/3 Find the 40th term of the A.P.: