Question

Midpoint of A(a+2d,a-3s) &B(2d-a,3s+a) is ____
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Answer 1

Step-by-step explanation:

In series a,a+d,a+2d..........a+2nd

The first term =a , common difference=d

Term =2n+1

Last term =a+2nd

We know that sum of series

=

2

2n+1

(fist term+last term)

=

2

2n+1

(a+a+2nd)=(2n+1)(a+nd)

Then mean of series

=

2n+1

sum of series

= n

(2n+1)(a+nd)

=(a+nd)