" If the sum of first "m" terms of an "AP" is "2m^(2)+3m," what is its second term? "

If the sum of first m terms of an AP is (2m^(2) + 3m) then what is its second 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 the first n terms of an AP is 4n-n^(2) ,what is the first term (that is )? What is the sum of first two terms? What is the second term? Similarly,find the 3rd, the 10th and the nth terms.

If the sum of first m terms of an A.P. is the same as the sum of its first n terms, show that the sum of its (m+n) terms is zero.

If the sum of first m terms of an A.P. is the same as the sum of its first n terms, show that the sum of its (m+n) terms is zero.

If the sum of first m terms of an A.P. is the same as the sum of its first n terms, show that the sum of tis (m+n) terms is zero.

If the sum of first m terms of an A.P.is the same as the sum of its first n terms,show that the sum of tis (m+n) terms is zero.

If the sum of first m terms of an A.P is n and sum of first n terms of the same A.P is m, show that sum of first (m+n) terms of it is -(m+n) .

The sum of first m terms of an AP is (4m^2-m) If its nth term is 107, find the value of n. Also find the 21st term of this AP

If the 'sum of first m terms of an A . P . be n and the sum of first n terms be m , show that the sum of first m+n terms is -(m+n)