Question

Find the sum of series 1.3.5.7.9.......n​

Answer 1

Step-by-step explanation:

we can find the sum of the series by The sum to n terms of an Arithmetic sequence is given by:

Sn=n2[2a+(n−1)d]

where a , is the 1st term , d the common difference and n , the number of terms to be summed.

Here a = 1 , d = 2 and n = 14

⇒S14=142[(2×1)+(13×2)]=196