For the geometric series below, write out the first few terms of the series to find a and r, and find the sum of the series. Then express the inequality \left | r \right |<1 in terms of x and find the values of x for which the inequality holds and the series converges. \sum_{n=0 }^{\infty }(-5^)^{n}(x)^{n} . recomended to express the inequality\left | ? \right |<1 and the inequality holds and the series converges for ?