Math, asked by kaur201104, 29 days ago

sn=5/2n2 -15/2n find common difference d

Answers

Answered by kismatverma

0

Answer:

yu543919 answer kismat

Answered by pathaksaurabh204

0

Answer:

Tn = Sn - Sn-₁

Tn = 2n² + n - 2(n-1)² - n - 1

Tn = 4n - 1

T1 = 4 - 1 =3

T2 = 8 - 1 = 7

So c.d. = 4

(Note -- If the Sn of AP is of the type an² + bn

common diffrence = 2a)

Step-by-step explanation:

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