Question

Write the sum of the first n terms of an
arithemetic sequence is 1, 3, 5, 7.....



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Answer 1

Step-by-step explanation:

it will help you.............

Answer 2

Answer:

Step-by-step explanation:

AP =1,3,5,7...             a=1 . d=2

SUM OF n TERMS = n/2*[a+nth term]

nth term = a+(n-1)d

Sn=n/2*[1+1+(n-1)2]

=n/2*[2+2n-2]

=n/2*2n

SUM OF N TERMS =n^2.