1 Crore+ students have signed up on EduRev. Have you? Download the App 
Find the sum of first 20 terms of an A.P. whose n^{th} term is given by T_{n} = (7 – 3n).
If 9^{th} term of an A.P. is zero, then its 29^{th} term is ________ its 19^{th} term.
Which term of the A.P. 5, 2, –1, ....... is –22?
In an A. P., the sum of first n terms is Find its 25^{th} term.
In an A.P., if the p^{th} term is ‘q’ and the qth term is ‘p’, then its n^{th} term is ________.
The sum of all terms of the arithmetic progression having ten terms except for the first term, is 99, and except for the sixth term, is 89. Find the 8^{th} term of the progression if the sum of the first and the fifth term is equal to 10.
The ratio of the sum of m and n terms of an A.P. is m^{2} : n^{2}, then find the ratio of m^{th} and n^{th} terms.
If x ≠ y and the sequences x, a_{1}, a_{2}, y and x, b_{1}, b_{2}, y each are in A.P., then is ________.
If the m^{th} term of an A.P. is 1/n and n^{th} term is 1/m, then the sum of first mn terms is _______.
Four numbers are inserted between the numbers 4 and 39 such that an A.P. results. Find the biggest of these four numbers.
11 videos36 docs201 tests

11 videos36 docs201 tests
