sn denotes the sum of first n terms of an AP,

whose common difference is d, then

Sn-2Sn-1 + Sn-2 (n > 2) is equal to

A) 2d

B) -d

C) d

D) None of these

Explain solution please

### Asked by Anubhavjain599 | 25th Aug, 2020, 10:16: PM

### This question has already been answered.
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### Answered by Renu Varma | 26th Aug, 2020, 10:13: AM

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