Sum of series yi

Given number:
$$i y$$
It is a series of species
$$a_{i} \left(c y - y_{0}\right)^{d i}$$
- power series.
The radius of convergence of a power series can be calculated by the formula:
$$R^{d} = \frac{y_{0} + \lim_{i \to \infty} \left|{\frac{a_{i}}{a_{i + 1}}}\right|}{c}$$
In this case
$$a_{i} = i y$$
and
$$y_{0} = 0$$
,
$$d = 0$$
,
$$c = 1$$
then
$$1 = \lim_{i \to \infty}\left(\frac{i}{i + 1}\right)$$
Let's take the limit
we find

True

False