The sum of first 'n' terms. Sn of a particular Arithmetic Progression is given by Sn=12n-2n^2. Find the first term and the commo

Question

koban [17]

3 years ago

12

The sum of first 'n' terms. Sn of a particular Arithmetic Progression is given by Sn=12n-2n^2. Find the first term and the commo

n difference.

Mathematics

1 answer:

Vitek1552 [10] · Answer 1 · 2022-02-13T06:41:47+03:00

Vitek1552 [10]3 years ago

4 0

Answer:

d=-4 and a=10

Step-by-step explanation:

The sum of a arithmetic sequence is given by (n/2)*(2a+(n-1)d). Comparing coefficients with the given Sn, we have; a-d/2=12 and d/2=-2, d=-4 and a=10.