Calculation: Z47iPn - 1
S_n =
| ( b_n* q-b1) |
| / (q-1) |
|
S_n =
$$S_{n}$$ = $$\frac{b_{n}\cdot q-b1}{q-1}$$
| ( b_n* q-b1) |
| / (q-1) |
S_n =
-
$$S_{n}$$ = $$\frac{b_{n}\cdot q}{q-1}-\frac{b1}{q-1}$$
| b_n* q |
| / (q-1) |
| b1 |
| / (q-1) |