Question

the sum to n terms of an ap is n^2.find the common difference.
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Answer 1

Answer:

d=2

Step-by-step explanation:

so in this first to find a(first term) put n=1,we get

a=1 now use,

Sn=n/2{2a+(n-1)d} put values

n^2=n/2{2+(n-1)d}

n=1+(n-1)×d/2

n-1=(n-1)×d/2

d=2