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Sum of nth term of an …

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Sum of nth term of an AP is n²- 2n . Check weather it is AP or not AP? If yes than find first term and common difference

Posted by Shreya Chand 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Khushi ?? 6 years, 4 months ago

Let n= 1 Then n^2-2n=(1)(1)-2(1)=-1=a If n=2 then 2*2-2*2=0= a+d +a Now, 2a+d =0 Therefore,-2+d =0 d=2

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