Class 11 Math Algebra Sequences and series
The sum of terms of an arithmetic series is . Find the first term and the common difference.
(a)
(b)
(c)
(d)
Correct answer: (c) 
Solution: The sum of n terms formula is given by,
........... (1)
Given :-    ......... (2)
Comparing equation (1) & (2), we get


     .......... (3)
On comparing factors of in equation (3)

On comparing factors of in equation (3), we have





Therefore, the first term, and the common difference, .

widgit image
Connecting you to a tutor in 60 seconds.
Get answers to your doubts.
play store logo
apple store logo
Similar topics
determinants
matrices
binomial theorem
complex numbers and quadratic equations
sequences and series
widgit image
Connecting you to a tutor in 60 seconds.
Get answers to your doubts.
play store logo
apple store logo
determinants
matrices
binomial theorem
complex numbers and quadratic equations
sequences and series