Question

the sum of first n terms of the series a,3a,5a,....is​

Answer 1

Answer:

the sum of n terms of the series is

Step-by-step explanation:

a+3a+5a+....................+Nth number term of the series

Answer 2

Answer:

Step-by-step explanation:

First term =a, common difference=2a

Sum.to n terms of AP= n/2 * (2a+(n-1)*d)

= n/2 * (2a+(n-1)2a)

= n/2 * (2a+2an-2a)

= n/2 * (2an)

Sum to n terms =an²