Find the sum of the first $25$ terms of an A.P whose $n$ th term is given by $a_{n} = 2 - 3 n$ .

- 925

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

- 928

No worries! We‘ve got your back. Try BYJU‘S free classes today!

- 923

No worries! We‘ve got your back. Try BYJU‘S free classes today!

- 929

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $- 925$
$a_{n} = 2 - 3 n$

$a_{1} = - 1$

$a_{2} = - 4$

$d = - 4 + 1 = - 3$

$S_{25} = \frac{25}{2} [- 2 + 24 (- 3)] = - 925$

Hence, option A is correct.

Suggest Corrections

Similar questions

n^{t h}

T_{n} = (7 - 3 n)

25

n^{t h}

a_{n}

= 2 - 3 n .

Find the sum of the first 25 terms of an A.P. whose nth term is given by $a_{n} = 2 - 3 n$ .

n

a_{n} = 2 - 3 n

25

Join BYJU'S Learning Program