The sum of the first n terms of the series 1/2+3/4+7/8+15/16.......is
Answers
Answered by
1
given:-
a = 1/2
d = a2- a1 = 3/4 -1/2 =3-2/4 = 1/4
to find:-
sn
solution:-
sn = n/2 ( 2a + (n-1)d)
= n/2 ( 2×1/2 + (n-1)1/4)
= n/2 ( 1 + n/4 -1/4)
= n/2 ( 3+n/4)
sn = n2+3n/4
a = 1/2
d = a2- a1 = 3/4 -1/2 =3-2/4 = 1/4
to find:-
sn
solution:-
sn = n/2 ( 2a + (n-1)d)
= n/2 ( 2×1/2 + (n-1)1/4)
= n/2 ( 1 + n/4 -1/4)
= n/2 ( 3+n/4)
sn = n2+3n/4
Similar questions