Question

the sum of the series 1 upon 2+ 1upon 3+1upon6...to 9 terms​

Answer 1

Given:

a=1/2

d=1/3-1/2

=2-3/6

=-1/6

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

=9/2*[2*1/2+(9-1)*(-1/6)]

=9/2*[1+-8/6]

=9/2*[(6-8)/6]

=9/2*2/6

=3/2

=1.5

Hope it helps.

Answer 2

Answer:

Explanation:(1.828968254) 1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9