Find the first term of the AP given that the n^th term is a and the sum to first n terms is b

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Solution

The correct option is C
Option C is the correct answer.

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Similar questions

Q. (i) The sum of first n terms of an AP is

(\frac{5 n^{2}}{2} + \frac{3 n}{2})

. Find the nth term and the 20th term of this AP. [CBSE 2006C]

(ii) The sum of the first n terms of an AP is

(\frac{3 n^{2}}{2} + \frac{5 n}{2})

. Find its nth term and the 25th term. [CBSE 2006C]

Find the sum of first n terms of an AP Whose nth term is (5-6n). Hence, find hte sum of its first 20 terms.

Q. Find the

n^{t h}

term if sum of first n terms of an AP is

(3 x^{2} + n)

Q. If the sum of the first n terms of an AP is given by Sn = (3n² − n), find its (i) nth term, (ii) first term, and (iii) common difference.

(i) the sum fo the first n terms of an AP is $(\frac{5 n^{2}}{2} + \frac{3 n}{2})$ . Find hte nth term and the 20th term of this AP.
(ii) The sum of the first n terms of an AP is $(\frac{3 n^{2}}{2} + \frac{5 n}{2})$ . Find its nth term and the 25th term.

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Find the first term of the AP given that the nth term is a and the sum to first n terms is b

The correct option is C Option C is the correct answer.

Find the first term of the AP given that the n^th term is a and the sum to first n terms is b

The correct option is C
Option C is the correct answer.