Page 76 - DIGITAL BOOK MUHAMMAD AZWARDI NASUTION
P. 76
CTT:
S∞ ganjil =U + U + U +…
5
1
3
= a + ar + ar +…
2
4
a
=
−
1 r 2
S∞ genap =U +U +U + …
6
2
4
5
= ar + ar +ar +…
3
ar
=
−
1 r 2
a ar
S∞ganjil+S∞genap= + 2
−
−
1 r 2 1 r
1 ( a + r )
=
1 ( − r )( 1+ ) r
a
= = S ∞
1 − r
